Growing up in the '80's, sledding was pretty much a blood sport. Between shoving matches on our way down the hill, flying off hastily-made 'jumps' in the middle of the hill or just crashing into each other at the bottom of the hill, things could get pretty brutal!
A bunch of high school-looking kids rode a canoe down a snow covered hill and glided into a lake. The water had to be freezing. But that's not what I would have worried about.