There was a costume party at a mental hospital; the theme of 
the party was "war". 

The first person comes up onto the stage and says, "I'm an 
atomic bomb." He gets his applause and steps down.

The second person comes up and says, "I'm a hydrogen 
bomb." Again, there's applause and he steps down.

And then a naked little man comes up to the stage and says, 
"I'm dynamite." 

Everybody runs away hysterically. When one of them is asked 
why, he says, "Didn't you see how small his fuse was?"