I like your idea. Something really amusing happened to me about 5 years ago. It would have been hilarious to watch or to get on video, but hopefully my description will be somewhat funny too!
My family and I were at the Coorong with some family friends. We were on a stretch of beach where there were really steep sandhills. Us kids were running up and down the sandhills, and also doing air jumps on the way down. Well, I decided to run really fast down the hill, doing some air jumps at the start, but then just running straight down. It was such a fun and exhilarating feeling. When I got to the very base of the sandhill, I had no way of slowing down quickly. All in one fluid motion, I launched face-first into the hard sand straight after the sprint down the huge sandhill! My face hurt for ages after that, but I was laughing so hard, and so were all the adults who were watching my epic face-plant!!
Anyway, I thought that may amuse some people.
Happy Christmas everyone!