"In order to laugh at something, it is totally necessary:
.1) to know what you are laughing at
2) to know why you are laughing
3) to ask some people why they think you are laughing
4) to jot down a few notes
5) to Laugh . Even then, the thing may not be cleared up for dayz."
-Robert Benchley
.
(from the Introduction in The Great Movie Comedians by Leonard Maltin)


