Just what I need... another distraction

So I'm sitting in class when a friend IMs me a link to this website. It's addictive. They have stills from movies, except they've somehow made the people invisible. You're supposed to guess which movie it is. I consider myself pretty knowledgeable about movies, but this is hard! I only got about 35 or so. Some of them are easy (see below), but many are surprisingly tough.

A softball

This website occupied much of my two morning classes. And I wonder why I never manage to pull my grades up...

UPDATE

Click here once you've tired of driving yourself nuts.