Sometimes Superman gets really upset...and thats what happens on the 100% cotton Superman Exploding Symbol T-Shirt! Hey Superman bumps his knee off end tables just like anybody else. The only different is that he could fly through the center of the Earth and destroy the world in return. I dont think you get that angry when you get a boo-boo but I dont know you. Perhaps the Superman Exploding Symbol T-Shirt will get the point across?