These aren't the films you'll want to put on when you're tired from a long day at work and looking for something to restore your faith in humanity. These are grim, disturbing movies that might make it hard for you to sleep after watching them. That's not to say that they aren't also thoughtful and considered explorations of humanity and grief; it just means you probably shouldn't plan to watch them on a first date.

From horror provocateur Eli Roth's nasty film about a flesh-eating virus to a movie where part-time Avenger Scarlett Johansson leaves a baby alone on a beach, these are the most disturbing movies of the century so far.