(SPOILER)1980's:
1) Beverly Hills Cop
2) Dead Poets Society
3) Ghostbusters
4) Airplane
5) Amadeus
6) Big
7) Clue
8) Ferris Bueller's Day Off
9) ET
10) I was going to say Halloween 2 since it was the only one from the 80's remotely worth watching, but I couldn't remember that scene from it and had a hunch you'd be a dick and pick one of the later ones. With the help of google it's Halloween 4.
11) Top Gun
12) Rambo: First Blood part 2
13) Star Wars: The Empire Strikes Back
14) Indiana Jones and the Last Crusade
15) Karate Kid

1990's:
1) Patch Adams
2) Batman Returns
3) Terminator 2
4) Star Wars: The Phantom Menace
5) The Full Monty
6) The Hunt for Red October
7) Forest Gump
8) Wayne's World
9) City Slickers
10) Dragonheart
11) Get Shorty
12) Ransom
13) Not really sure on this one
14) Twister
15) Hook

2000's:
1) No clue
2) Gigli
3) Leatherheads
4) Final Fantasy: The Spirits Within
5) The Grudge
6) Harry Potter and the Order of the Phoenix
7) 40 Year Old Virgin
8) Juno
9) Jurassic Park 3
10) Lost in Translation
11) Avatar
12) Dodgeball
13) Napoleon Dynamite
14) The Lakehouse
15) The Lord of the Rings: Return of the King

2010's:
1) Bad Teacher
2) Iron Man 2
3) Jonah Hex
4) Paranormal Activity 2
5) The Other Guys