I had the characters in my book use the following movie quotes:

The Princess Bride - "I always think everything's a trap. That's why I'm still alive." And "Have fun storming the castle. Think it'll work? It'd take a miracle."

The Wrath of Khan - "Revenge is a dish best served cold." (Which Khan admits is a Klingon proverb.)

But for fun with your friends, who can best Monty Python (esp. The Quest for the Holy Grail) for hilarious nonsense?

"Come see the violence inherent in the system. Help, help! I'm being repressed!"

(More on my book: http://keripeardon.wordpress.com/)