If someone said years ago that Jon Stuart Leibowitz would become one of the respected and beloved comedians in the world, he would have been the first person to start laughing.

Marijuana doesn't need a stoner-movie to make things funny-but it helps. Here are ten scenes which pay tribute to the drug, rather than just exploit its controversial

A cameo used to refer to a famous person who made an appearance in a film as him or herself. Now actors play small parts as a character in a film for comic relief.