Well, guys - not too shabby 11 correct answers and 3 correct guesses.
1. Wayne's World
2. Patriot Games - it was guessed. {Jack Ryan: "...tits."}
3. The Big Lebowski
4. Evolution - the spread of the alien menace
5. Lost In Translation - Japanese MTV
6. Fight Club
7. Sum Of All Fears - News about the nuclear blast
8. Dumb and Dumber
9. Heat
10. Clear and Present Danger - another guess that could've been right if it weren't for the pesky question mark
11. The Italian Job - "What does a guy with 35 million dollars do at night? Watches his big ass TV." (the original Italian Job, no less)
12. Dude, Where's My Car?
13. SLC Punk
14. Strange Brew - the parents watching cartoons
15. Back To The Future - first guess was the right one
16. Vanilla Sky
17. The Professional
18. Speed
19. Billy Madison - "Speak for yourself, moron!"
20. Office Space