A couple that jump to my mind
- during an Outward-Bound-like course in the High Sierras, my "final" consisted of going solo three days without food, tent, sleeping bag, or matches, and then spending the next two days walking 50 miles with 4 or 5 others to get to our exit point. It was pouring rain almost that entire 5-day stretch. I was 16 and a bit tougher/more resilient than I am now.
- while approaching a climb in Yosemite my partner and I got "off route" and wound up having to tunnel about 30 ft through a huge, healthy hedge of poison ivy before we finally emerged in a clearing.
