0:00:01.500,0:00:02.850 Let me show you something with my car. 0:00:04.900,0:00:07.190 You know how sometimes you walk up to the trunk 0:00:07.190,0:00:10.820 and your hands are full, well here's how you do it. 0:00:10.820,0:00:17.536 >> That's really cool. 0:00:17.536,0:00:19.810 >> want to try? 0:00:19.810,0:00:21.541 >> Can I try? [SOUND] 0:00:21.541,0:00:22.041 >> So 0:00:25.420,0:00:26.290 were you kicking something? 0:00:26.290,0:00:27.760 >> How do you think it works? 0:00:27.760,0:00:28.780 >> Is there a particular place? 0:00:28.780,0:00:30.430 >> Mm. So what do you think is going on? 0:00:30.430,0:00:31.300 >> Oh, oh, there it goes. 0:00:31.300,0:00:32.670 >> So what did you do? 0:00:32.670,0:00:34.510 >> I'm not sure what I did. 0:00:34.510,0:00:35.480 >> You think you could do it again? 0:00:35.480,0:00:37.540 >> Well, I don't know. Let's see. 0:00:37.540,0:00:37.830 >> Yeah. So what's- 0:00:37.830,0:00:38.580 >> I don't know what I did. 0:00:38.580,0:00:40.999 >> So what's your conceptual model of what's going on? 0:00:40.999,0:00:45.760 >> [LAUGH] Maybe there's a sensor there, and I have to, 0:00:45.760,0:00:46.130 >> Somewhere. 0:00:46.130,0:00:49.710 >> Yeah, somewhere under there. It looks like. 0:00:49.710,0:00:50.340 >> You know, 0:00:50.340,0:00:53.180 this is a really good example, if you like, 0:00:53.180,0:00:56.170 it's a good example of a bad example of crossing 0:00:56.170,0:00:59.270 the gulf of execution and the gulf of evaluation. 0:00:59.270,0:01:02.590 The gulf of execution. Well I'm suppose to kick or 0:01:02.590,0:01:06.440 something, but where and how? How fast, or do 0:01:06.440,0:01:08.980 I kick or just wave my foot? And the gulf 0:01:08.980,0:01:12.270 of execution, well I did it and nothing happened. 0:01:12.270,0:01:15.820 Now what am I suppose to do? Really good example 0:01:15.820,0:01:16.780 of bad design.