Monty Python and the Holy Grail is my all time favorite.

Field of Dreams
Last Samurai
It's a Wonderful Life
Unforgiven
Sin City
Grandma's Boy
Sixth Sense
Any of the Marx Brothers movies
Remember the Titans
Terminator (first one only)
Half Baked
Eating Raoul
Buckaroo Banzai
Caddy Shack
Stripes
Quigly Down Under
Shawshank Redemption
Four Rooms

Gaaaahhhh, there's too many.