0:00:00.000,0:00:01.679 so how bad do you think[br]this carabiner is? 0:00:01.679,0:00:04.400 it's really bad... it's super super sharp 0:00:04.400,0:00:07.879 super super sharp?[br]it's not only a little bit worn out 0:00:07.879,0:00:08.880 it's super sharp 0:00:08.880,0:00:11.119 where did you got it from from? [br]from a crag 0:00:11.119,0:00:15.199 so this is a real carabiner[br]from real crag 0:00:15.199,0:00:17.480 yes, there was an accident[br]in this crag 0:00:17.480,0:00:19.519 and the climber... 0:00:19.519,0:00:21.640 died... 0:00:21.640,0:00:24.079 as you can see it's really sharp 0:00:24.079,0:00:27.280 I want to feel it 0:00:27.679,0:00:31.120 it doesn't feel that sharp for me 0:00:31.120,0:00:32.200 i mean it's not a knife 0:00:32.200,0:00:33.280 yeah yeah yeah 0:00:33.280,0:00:35.679 but like for a rope this is enough 0:00:35.679,0:00:37.000 good to know... 0:00:37.640,0:00:39.079 right 0:00:39.079,0:00:40.840 i don't know about you 0:00:40.840,0:00:43.479 but personally i never had to witness 0:00:43.479,0:00:46.359 anybody completely snapping his or her 0:00:46.359,0:00:47.719 climbing rope 0:00:47.719,0:00:50.359 during a real climbing fall but 0:00:50.359,0:00:52.920 unfortunately it happens 0:00:52.920,0:00:54.119 so 0:00:54.119,0:00:56.200 people who watch my channel 0:00:56.200,0:00:58.200 and have fear of falling 0:00:58.200,0:01:01.399 watch this video and they will have more 0:01:01.399,0:01:03.479 fear of falling after it 0:01:03.479,0:01:05.319 now if you're one of these more 0:01:05.319,0:01:08.280 sensitive people don't worry just 0:01:08.280,0:01:11.079 imagine me holding your hand as i guide 0:01:11.079,0:01:13.480 you through this video and everything is 0:01:13.480,0:01:16.599 gonna be fine. Okay jokes aside this is a 0:01:16.599,0:01:19.560 part two of my conversations with rope 0:01:19.560,0:01:22.200 experts from Mammut, where in a part one 0:01:22.200,0:01:24.840 i showed you how a soft spot in your 0:01:24.840,0:01:27.719 climbing rope can easily end up in a 0:01:27.719,0:01:30.760 broken sheath on a realistic climbing 0:01:30.760,0:01:34.120 fall we broke the sheath after two falls 0:01:34.120,0:01:36.519 and you said it's gonna last 0:01:36.519,0:01:38.439 something like this 0:01:38.439,0:01:41.159 unfortunately i've seen this way too 0:01:41.159,0:01:43.879 many times the good news as we saw in 0:01:43.879,0:01:46.200 that video that even with completely 0:01:46.200,0:01:49.000 broken sheath the rope was still hard to 0:01:49.000,0:01:49.959 snap 0:01:49.959,0:01:52.840 *the bad news is that the core strands 0:01:52.840,0:01:56.519 are way easier to cut 0:01:58.040,0:02:00.200 somebody said of course it's easy to cut 0:02:00.200,0:02:02.760 when you use a swiss army knife so this 0:02:02.760,0:02:05.799 is not a swiss army knife it's actually 0:02:05.799,0:02:08.199 quite dull this is 80 kilograms and this 0:02:08.199,0:02:10.680 is a rope 0:02:17.240,0:02:21.800 okay that was not that hard 0:02:21.800,0:02:25.159 let's get rid of the sheath 0:02:29.319,0:02:31.960 okay so now the climber is hanging only 0:02:31.960,0:02:35.719 on core strands let's see how 0:02:35.719,0:02:37.479 hard it is to cut 0:02:37.479,0:02:40.439 the core strands 0:02:47.479,0:02:49.639 so if during the fall you would lose 0:02:49.639,0:02:52.039 your sheath and then your rope would run 0:02:52.039,0:02:54.759 across a sharp edge 0:02:54.759,0:02:56.680 so assuming that you take care of your 0:02:56.680,0:02:59.080 rope and it's in a good condition 0:02:59.080,0:03:01.719 then you still have to quite often 0:03:01.719,0:03:05.080 overlook dangers 0:03:06.120,0:03:08.039 so first 0:03:08.039,0:03:10.680 is all the equipment that your rope goes 0:03:10.680,0:03:12.560 through 0:03:12.560,0:03:25.800 [Music] 0:03:27.159,0:03:29.400 oh 0:03:29.479,0:03:32.439 so this was a new quickdraw before i 0:03:32.439,0:03:35.400 did that and as you can see the paint at 0:03:35.400,0:03:38.280 this point is already wearing off and if 0:03:38.280,0:03:40.360 i would continue doing that or i would 0:03:40.360,0:03:42.360 just go climbing and take falls on this 0:03:42.360,0:03:44.520 quickdraw this part would develop a 0:03:44.520,0:03:46.919 groove something like this 0:03:46.919,0:03:50.199 or in some cases even worse so a little 0:03:50.199,0:03:52.439 groove after some time of climbing is 0:03:52.439,0:03:55.159 definitely normal and usually it's not a 0:03:55.159,0:03:57.639 problem since the rope makes it nice 0:03:57.639,0:04:00.199 smooth and round 0:04:00.199,0:04:03.159 usually but not always 0:04:03.159,0:04:05.879 like in the story where the climber died 0:04:05.879,0:04:08.120 the situation was like this the route 0:04:08.120,0:04:10.599 was traversing under the roof and the 0:04:10.599,0:04:13.000 crux was after a second quick draw 0:04:13.000,0:04:15.319 that's where everybody kept falling and 0:04:15.319,0:04:17.800 this quickdraw probably had a nice and 0:04:17.800,0:04:19.399 round edge 0:04:19.399,0:04:22.120 however this quickdraw only seen a 0:04:22.120,0:04:24.839 sideways motion sideways friction from 0:04:24.839,0:04:28.360 the rope and nobody ever fell on it 0:04:28.360,0:04:32.120 until one day a climber took a fall 0:04:32.120,0:04:35.079 and his rope was cut on this quickdraw 0:04:35.079,0:04:37.959 do you test how your ropes are resistant 0:04:37.959,0:04:40.439 to cutting and are there any standards 0:04:40.439,0:04:42.680 start with the second question first so 0:04:42.680,0:04:45.560 and no there are no standard tests for 0:04:45.560,0:04:47.319 the cut resistance i mean in the 0:04:47.319,0:04:50.120 standard today this default test which i 0:04:50.120,0:04:52.279 think everyone has seen a million times 0:04:52.279,0:04:54.839 but here the rope falls over a clamp 0:04:54.839,0:04:57.480 that's very similar to a new carabiner 0:04:57.480,0:05:00.040 so to demonstrate how bad a sharp 0:05:00.040,0:05:01.560 carabiner can be 0:05:01.560,0:05:03.959 we took a brand new rope and rigged a 0:05:03.959,0:05:06.439 realistic fall scenario 0:05:06.439,0:05:08.920 this is 9.5 0:05:08.920,0:05:11.639 grand euro 0:05:12.759,0:05:13.720 oh 0:05:13.720,0:05:15.720 first of all brand new rope 0:05:15.720,0:05:19.240 entire sheath of the rope got wrecked the 0:05:19.240,0:05:21.160 force in area is really it's nothing 0:05:21.160,0:05:23.720 hard i'm actually shocked by this like 0:05:23.720,0:05:27.360 this is crazy. Now we change to the one 0:05:27.360,0:05:28.360 the old rope 0:05:28.360,0:05:30.600 let's see what happens if your rope is 0:05:30.600,0:05:33.000 actually fuzzy and old so we take the 0:05:33.000,0:05:35.399 same old rope we find another spot which 0:05:35.399,0:05:38.199 is quite fuzzy it's 0:05:38.199,0:05:40.439 definitely people would still climb on 0:05:40.439,0:05:41.319 this 0:05:41.319,0:05:42.759 soft 0:05:42.759,0:05:45.399 but not completely bad 0:05:45.399,0:05:47.720 will it snap no you think it will not 0:05:47.720,0:05:48.680 snap 0:05:48.680,0:05:51.079 how many lives the quarter will lose 0:05:51.079,0:05:54.199 two strands will be snapped of the core 0:05:54.199,0:05:56.360 okay, and the sheath. Okay his guess is 0:05:56.360,0:05:58.600 two out of eight 0:06:02.199,0:06:04.439 so half of the core's strands snapped, so 0:06:04.439,0:06:05.519 on the old rope half 0:06:05.519,0:06:06.499 of the strands snapped 0:06:06.519,0:06:07.439 on the new one none 0:06:07.439,0:06:08.680 [Music] 0:06:08.680,0:06:10.759 it's still good to know that even the 0:06:10.759,0:06:13.720 old old rope kind of survived but if the 0:06:13.720,0:06:16.120 fall would be bigger a little bit bigger 0:06:16.120,0:06:18.439 i mean then it would snap be careful 0:06:18.439,0:06:19.959 with sharp edges 0:06:19.959,0:06:22.680 a couple of years ago UIAA tried to 0:06:22.680,0:06:25.639 implement a cut resistant test where the 0:06:25.639,0:06:27.879 rope had a dynamic fall over a sharp 0:06:27.879,0:06:29.800 edge i think it was a year or two on the 0:06:29.800,0:06:32.279 market and then it they cancel it 0:06:32.279,0:06:33.319 because the 0:06:33.319,0:06:35.480 testing it did not work 0:06:35.480,0:06:38.600 now yeah hillary they have their own 0:06:38.600,0:06:41.800 test method and we are also looking into 0:06:41.800,0:06:44.519 this actually since a long long time the 0:06:44.519,0:06:47.639 rope takes a dynamic fall over a granite 0:06:47.639,0:06:51.079 edge and slides over this granite edge 0:06:51.079,0:06:53.319 so at the moment it's up to the brands 0:06:53.319,0:06:55.399 themselves to do their internal testing 0:06:55.399,0:06:56.519 there is no 0:06:56.519,0:07:00.120 universal standard correct it will come 0:07:00.120,0:07:02.519 one day so now the climber is hanging 0:07:02.519,0:07:04.839 only on four strands of the rope and we 0:07:04.839,0:07:07.639 are gonna show how much it takes to 0:07:07.639,0:07:09.399 completely snap the rope if you just 0:07:09.399,0:07:13.759 barely touch with the knife 0:07:14.360,0:07:16.040 it's crazy 0:07:16.040,0:07:18.439 it's just nothing yeah he barely touched 0:07:18.439,0:07:21.240 with the sharp edge and it snapped yeah 0:07:21.240,0:07:22.680 this is the 0:07:22.680,0:07:25.959 the carabiner we did the test with now 0:07:25.959,0:07:28.680 it doesn't feel like a knife but the 0:07:28.680,0:07:30.839 groove is very deep it's definitely at 0:07:30.839,0:07:33.160 the edges it's sharp 0:07:33.160,0:07:34.519 but it's 0:07:34.519,0:07:37.480 not something that i would expect out of 0:07:37.480,0:07:40.199 snapping the rope like that so please 0:07:40.199,0:07:42.199 take care of your carabiners and if 0:07:42.199,0:07:45.000 you're climbing on fixed carabiners 0:07:45.000,0:07:46.920 make sure to check them as well 0:07:46.920,0:07:50.279 it's a deep groove but somehow i was 0:07:50.279,0:07:54.040 expecting an a sharper edge to be honest 0:07:54.040,0:07:58.680 because it still feels kind of smooth 0:07:59.879,0:08:00.920 good to know 0:08:00.920,0:08:02.680 good to know definitely 0:08:02.680,0:08:04.839 so in addition to ropes chewing through 0:08:04.839,0:08:07.079 your quick draws you should also be 0:08:07.079,0:08:09.720 aware how and where you clip your quick 0:08:09.720,0:08:12.279 draws for example this one the rope 0:08:12.279,0:08:14.199 should be only clipped to the blue 0:08:14.199,0:08:16.439 carabiner and if you don't know why you 0:08:16.439,0:08:18.680 should watch my master class on quick 0:08:18.680,0:08:21.000 draws let's say for whatever reason i 0:08:21.000,0:08:23.480 want to connect myself to the bolt using 0:08:23.480,0:08:27.079 a quickdraw if i would do this 0:08:27.079,0:08:29.319 this is actually a really bad idea 0:08:29.319,0:08:32.440 because the bolt can leave a sharp cut 0:08:32.440,0:08:35.080 on this carabiner and this carabiner 0:08:35.080,0:08:37.639 later will get in contact with the rope 0:08:37.639,0:08:39.240 so instead of that 0:08:39.240,0:08:41.480 do the opposite 0:08:41.480,0:08:43.399 the carabiner which is designed to go to 0:08:43.399,0:08:45.639 the bolt goes to the bolt and the rope 0:08:45.639,0:08:47.559 and goes to something soft there was 0:08:47.559,0:08:49.080 also for example an accident in 0:08:49.080,0:08:51.559 switzerland in mountain guide aspirant 0:08:51.559,0:08:53.879 courses one mountain guide lowered two 0:08:53.879,0:08:56.759 person on one strand 8.7 millimeter 0:08:56.759,0:08:58.759 diameter he lowered them 0:08:58.759,0:09:01.000 both on this single strand and then like 0:09:01.000,0:09:03.000 one and a half meters below his feet 0:09:03.000,0:09:05.000 there was like an edge but really like 0:09:05.000,0:09:07.080 we we had a look at it it was not a 0:09:07.080,0:09:09.480 sharp edge i would say it's it's just 0:09:09.480,0:09:12.440 like a normal edge which you find like 0:09:12.440,0:09:15.159 in every direction, you are scaring my 0:09:15.159,0:09:18.759 viewers the whole rope um got got cut and 0:09:18.759,0:09:20.840 this brings us to a second danger for 0:09:20.840,0:09:22.440 climbing ropes 0:09:22.440,0:09:25.320 sharp rock formations so if you're a 0:09:25.320,0:09:27.960 sensitive person now it's a time to hold 0:09:27.960,0:09:31.120 my hand 0:09:41.159,0:09:43.799 so the climber actually survived 0:09:43.799,0:09:46.840 and this is an old video posted by 0:09:46.840,0:09:49.399 british mountaineering council 0:09:49.399,0:09:54.519 and i guess the clip speaks for itself 0:09:56.919,0:10:00.039 do you have any statistics on accidents 0:10:00.039,0:10:02.679 that happen due to snapping climbing 0:10:02.679,0:10:05.480 rope so the best statistic that i know 0:10:05.480,0:10:07.320 of is the one from the german alpine 0:10:07.320,0:10:10.759 club they actually kept the register 0:10:10.759,0:10:12.840 of all the rope accidents that took 0:10:12.840,0:10:16.440 place i think was for the last 60 years 0:10:16.440,0:10:17.639 there they have 0:10:17.639,0:10:20.279 53 cases where they know 0:10:20.279,0:10:21.080 why 0:10:21.080,0:10:24.120 the rope broke and what's the most common 0:10:24.120,0:10:27.399 cause sharp edges sharp edges 0:10:27.399,0:10:29.000 66 percent 0:10:29.000,0:10:31.320 so when the fall happens and you swing 0:10:31.320,0:10:34.039 over the sharp edge either you take a 0:10:34.039,0:10:37.559 fall over a sharp edge or you're lowered 0:10:37.559,0:10:40.440 over a sharp edge or you're 0:10:40.440,0:10:42.279 you know you're taking some kind of 0:10:42.279,0:10:45.000 swing over a sharp edge but it's not 0:10:45.000,0:10:47.240 only the rock formation it can also be 0:10:47.240,0:10:50.600 due to carabiners sharp carabiners or 0:10:50.600,0:10:51.399 other 0:10:51.399,0:10:54.120 metal objects and speaking of statistics 0:10:54.120,0:10:56.279 i asked my instagram followers to send 0:10:56.279,0:10:59.720 me stories pictures videos about rope 0:10:59.720,0:11:03.399 damage and while i got no complete snaps 0:11:03.399,0:11:04.320 i got this one 0:11:04.320,0:11:06.559 which looks like it got a lot of 0:11:06.559,0:11:09.440 abrasion and this one was hit by a rock 0:11:09.440,0:11:12.000 with just few strands left and this is 0:11:12.000,0:11:14.399 my favorite one it was actually a brand 0:11:14.399,0:11:17.120 new rope only three falls and the owner 0:11:17.120,0:11:19.679 claims that there was no sharp edges and 0:11:19.679,0:11:22.320 the quick draws were fine the only catch 0:11:22.320,0:11:25.600 with this rope was 8.9 millimeters 0:11:25.600,0:11:27.919 thickness only do you see a difference 0:11:27.919,0:11:30.639 in cut resistance among thicker ropes 0:11:30.639,0:11:33.519 versus thinner ropes oh yes so i mean if 0:11:33.519,0:11:36.240 you want a higher safety margin i mean 0:11:36.240,0:11:39.200 the thicker the rope is the better so 0:11:39.200,0:11:42.480 how much safer is let's say 9.8 rope 0:11:42.480,0:11:45.759 compared to 9.5 or 9.2 so turns out 0:11:45.759,0:11:47.679 Mammut already did the testing on this 0:11:47.679,0:11:50.159 where we use the same sharp carabiner 0:11:50.159,0:11:53.039 and checked at what fall height the rope 0:11:53.039,0:11:55.279 will snap and these were the results so 0:11:55.279,0:11:57.600 we had all heights up to five meters and 0:11:57.600,0:12:01.200 we tested like different rope diameters 0:12:01.200,0:12:02.080 and 0:12:02.080,0:12:03.919 like a half and twin rope and to no 0:12:03.919,0:12:06.720 surprise thicker ropes perform better 0:12:06.720,0:12:09.440 with double robes being the safest and 0:12:09.440,0:12:11.759 this actually brings me to a current 0:12:11.759,0:12:14.480 trend where people buy ultra skinny 0:12:14.480,0:12:16.960 ropes thinking that they are the best 0:12:16.960,0:12:19.679 maybe if you're not at that level where 0:12:19.679,0:12:22.240 it's like so so important for you every 0:12:22.240,0:12:26.000 gram every little millimeter of the rope 0:12:26.000,0:12:27.440 maybe it's not 0:12:27.440,0:12:29.600 important to buy the thinnest rope you 0:12:29.600,0:12:32.000 can on the market i mean if you can 0:12:32.000,0:12:33.840 i would recommend having two ropes now 0:12:33.840,0:12:36.000 you have the the thicker one for for 0:12:36.000,0:12:38.320 working out the routes and one you can 0:12:38.320,0:12:39.440 also 0:12:39.440,0:12:41.840 use when you know how you feel like oh 0:12:41.840,0:12:44.240 this route could be a little bit 0:12:44.240,0:12:46.639 sketchy there with some sharp edges then 0:12:46.639,0:12:48.080 you take the thick rope and then you 0:12:48.080,0:12:50.559 have a thinner rope which you might use 0:12:50.559,0:12:51.440 when you 0:12:51.440,0:12:53.120 already checked out the route and you 0:12:53.120,0:12:55.200 want to have a really good goal in 0:12:55.200,0:12:57.360 sanding the roots so this video is not 0:12:57.360,0:12:59.679 sponsored but a little disclaimer is 0:12:59.679,0:13:01.759 that i got these ropes for free from 0:13:01.759,0:13:04.159 Mammut and i have to say that climbing 0:13:04.159,0:13:07.399 my hardest projects on this ultra skinny 0:13:07.399,0:13:11.120 9.0 rope was really nice 0:13:20.159,0:13:23.120 however for anything new unknown my 0:13:23.120,0:13:25.679 go-to rope is nine and a half 0:13:25.679,0:13:27.360 millimeters thickness 0:13:27.360,0:13:29.279 and if i would have to choose just one 0:13:29.279,0:13:32.080 rope to own this would be it and i guess 0:13:32.080,0:13:34.399 if i would be climbing in some sketchier 0:13:34.399,0:13:36.639 places or i would be 0:13:36.639,0:13:38.559 heavier i hope not maybe i would 0:13:38.559,0:13:41.440 consider even thicker rope than that 0:13:41.440,0:13:43.600 it's pretty obvious that falls like this 0:13:43.600,0:13:46.320 should be avoided at all cost but in 0:13:46.320,0:13:49.360 general if the rope is running across a 0:13:49.360,0:13:50.799 sharp edge 0:13:50.799,0:13:54.240 soft dynamic delaying is actually very 0:13:54.240,0:13:56.480 important because if the belayer takes 0:13:56.480,0:13:59.039 really hard that increases the peak 0:13:59.039,0:14:01.600 force on the rope and also the damage 0:14:01.600,0:14:04.559 will be concentrated on a smaller area 0:14:04.559,0:14:07.120 of the rope so more things to go wrong 0:14:07.120,0:14:09.519 okay let's change gears you guys asked 0:14:09.519,0:14:12.720 me what about unicore rose sounds almost 0:14:12.720,0:14:15.840 like unicorn so a unicore rope has its 0:14:15.840,0:14:18.639 core and sheath strands kind of hooked 0:14:18.639,0:14:21.679 together so this is not a unicore rope 0:14:21.679,0:14:25.200 and if i would pull the sheath 0:14:25.200,0:14:27.279 you can see that they are completely 0:14:27.279,0:14:30.559 independent and this would not happen on 0:14:30.559,0:14:33.039 unicore ropes if a rope is developed 0:14:33.039,0:14:35.360 well the sheath and the core are 0:14:35.360,0:14:38.320 perfectly matched together so they can 0:14:38.320,0:14:41.279 move very well why don't you hook them 0:14:41.279,0:14:43.759 together i saw some brands doing that is 0:14:43.759,0:14:46.399 there any benefit of doing one or other 0:14:46.399,0:14:49.919 way you can do this but nowadays the 0:14:49.919,0:14:52.879 ropes are so well designed that 0:14:52.879,0:14:55.600 for example sheath slippage does not 0:14:55.600,0:14:58.799 occur that often anymore actually 0:14:58.799,0:15:01.600 on most of the ropes not most on all of 0:15:01.600,0:15:03.840 our ropes we have a sheath slippage of 0:15:03.840,0:15:06.320 zero and this is without intertwining 0:15:06.320,0:15:07.919 the sheath with the core what does it 0:15:07.919,0:15:11.840 mean zero shift slippage if you 0:15:11.840,0:15:14.080 pull the rope over an edge back and 0:15:14.080,0:15:16.879 forth how much the core 0:15:16.879,0:15:19.200 would move to one side or the other but 0:15:19.200,0:15:20.960 if it stays in place then it's well 0:15:20.960,0:15:24.000 balanced yeah i've seen some ropes lose 0:15:24.000,0:15:26.720 the core in the ends of the rope yes the 0:15:26.720,0:15:29.519 ends get completely soft yeah so this is 0:15:29.519,0:15:31.919 actually what sheath slippage is is that 0:15:31.919,0:15:33.919 the core and the sheath 0:15:33.919,0:15:37.120 don't move at the same pace basically 0:15:37.120,0:15:40.000 so your ropes don't do that 0:15:40.000,0:15:43.360 so as i understand intertwining the core 0:15:43.360,0:15:46.480 with sheath doesn't add much benefit for 0:15:46.480,0:15:48.080 sport climbers 0:15:48.080,0:15:50.480 however if you are ascending a rope 0:15:50.480,0:15:52.480 let's say you marrying a rope and your 0:15:52.480,0:15:54.399 sheath gets cut 0:15:54.399,0:15:55.600 it can 0:15:55.600,0:15:57.919 slide down 0:15:57.919,0:16:01.159 kind of 0:16:01.519,0:16:03.440 well it can slide down 0:16:03.440,0:16:04.480 here 0:16:04.480,0:16:06.080 this can happen 0:16:06.080,0:16:08.399 but this sliding would not happen on a 0:16:08.399,0:16:10.559 unicore rope so yeah i don't know if i'm 0:16:10.559,0:16:12.720 missing some benefits of unicore ropes 0:16:12.720,0:16:15.360 for sport climbers let me know i'm super 0:16:15.360,0:16:18.080 curious all right i hope that your fear 0:16:18.080,0:16:20.240 of falling is under control and maybe 0:16:20.240,0:16:22.240 you even learned something 0:16:22.240,0:16:25.120 and i'm gonna release more interviews 0:16:25.120,0:16:27.519 with Mammut engineers about some more 0:16:27.519,0:16:30.320 geeky topics about climbing ropes and 0:16:30.320,0:16:32.480 that's going to be exclusive for people 0:16:32.480,0:16:35.200 who are supporting my channel so if you 0:16:35.200,0:16:38.240 are interested in that or you just want 0:16:38.240,0:16:40.480 to support me consider visiting my 0:16:40.480,0:16:43.039 website and thank you so much and thank 0:16:43.039,0:16:45.200 you Mammut for inviting me and i hope 0:16:45.200,0:16:47.440 to come back one day why is that why 0:16:47.440,0:16:50.720 some ropes get stiffer and softer well 0:16:50.720,0:16:54.000 to answer that question like textiles is 0:16:54.000,0:16:57.440 a very tricky and moody raw material to 0:16:57.440,0:16:59.879 work with moody it's very moody