2 snowboarders. They were the only people on the slope and thus had all the space in the world. He RdOTFL when he saw them collide at high speed.
I'm reminded of the first automobile accident in Illinois. The year was something like 1908 and the only two vehicles within a 150 mile radius in a southern Illinois town crashed into each other.
I was told off for getting too close when I felt that I was at a fine distance.
Next time don't hug them from behind, lol