All right:
1. Galaxy Quest (great to see some love for this movie in the OP
)
2. National Lampoon's Christmas Vacation
3. Austin Powers: International Man of Mystery
4. Office Space
5. Spaceballs
6. Revenge of the Nerds
7. Forgetting Sarah Marshall
8. National Lampoon's Vacation
9. Blazing Saddles
10. Dr. Strangelove
11. The Hangover
12. Ghostbusters
13. Clerks
14. Mallrats
15. Eurotrip