Can You Quote a Movie?

What movies do you quote in real life all the time?  When someone gets your reference, you know you’ve found a pal.  One of my friends constantly quotes The Princess Bride, a movie I totally did not “get.”  I often thrown in a Monty Python quote in conversation (“just a flesh wound”).  I especially love it when children’s movies have quotable lines for the adults.

So, what’s your favorite quotable line?