These are the 4 most stupid things someone could do. Why would they do it? The top left one is throwing 2 bowling balls out of an airplane that is flying above a neighbourhood. The top right one is putting a boulder on the tracks of a Mag-Lev high speed train. The bottom left one is kicking a row of police motorbikes like dominos. And the bottom right one is driving a RC truck onto a busy road. What one do you think is the sillyest?