http://en.wikipedia.org/wiki/Slapstick
My SO is the world’s biggest klutz! He always does stupid things, and trips over his own feet, falls down, etc. I can’t help but laugh at him because I can see that he is going to get hurt, but insists on doing what he is doing anyway. For example. He has a low backed rocker in the living room. Sometimes he drops things behind it. Instead of pulling the chair out from the wall and picking up what he dropped, he kneels in the rocker and reaches down to pick the item up. Of course the rocker goes back, and he jams his head into the wall.. which puts this look of surprise on his face that makes me howl with laughter!! What makes it even funnier to me is that you would think he would learn not to repeat it, but he has done this several times.