I followed others and got into the hole in purpose. But apparently, I didn't know how to play / deal with a sticky hole. I tried to surf it straight instead of sideway, then it flipped me. I rolled up three times before giving up, because I realized more rolls probably won't get me out of the hole. After wet exit, I finally got out of the hole.

Here is a great series of articles to read about hole: https://www.lowercolumbiacanoeclub.org/riverrunnerblog/understanding-holes

River: South Fork American River
Section: The Gorge
Flow: 1300 cfs