I'll start: Telluride, March 7th 2015. Revelation Bowl lift.
A pal of mine and I watched some dude push, literally push, his son/nephew/little brother/ whatever, down one of the lines in Revelation as he skied behind him. The kid was trying to snowplow and kept wiping out. He was crying/yelling and clearly didn't have the ability to ski that kind of terrain. It was absolutely horrifying, we saw the pair come off of See Forever on our first ride up, and on our second lap they had made it about 1/4 of the way down the bowl. The kid was still trying to snowplow. It really didn't make me feel good at all.