It's easy being funny when the jokes are already written for you. Ask Jay Leno. But improvising takes talent, and improvising leads to the funniest, deepest, and best takes. Check out the top 25 improvised scenes in movie history.

 

First of all, there is a LOT of swearing in this, so beware.  But it's pretty crazy to think all of these scenes just happened, with no lines or direction.  I'm not saying actors are the most talented people in the world, but it's an art form none the less.