Movie Stills Meme. Live in fear.

Ganked from the lovely miss rafaela:

1. Pick 20 films you love/thoroughly enjoyed.
2. Find screen captures (stills) for each film, preferably from scenes you like.
3. Post the pictures with the rules; let your readers guess from what movie each still is from. (Readers, no cheating. No google, no looking at Livejournal interests or looking at the file names.) Basically, do not cheat.

This being me, the obsessive-compulsive overachieving movie fan, I ended up with 30 titles. The first 20 are the official list, while the final ten are the "prestige" (i.e. "Adam's going to be very impressed with you if you get any of these") titles.

EDIT: I've listed the person with the first correct answer to each item that's been identified so far (although in many cases, more than one person has answered correctly). For the sake of those who haven't gotten a chance to play yet, though, I'm not including those answers next to the stills just yet; if you're curious about any of them, just scroll down to the appropriate responses.

( The 30 stills lie within. Again, no cheating! )