20. Birdemic - Shock And Terror (James Nguyen, 2010)
Birdemic was a cult-sensation when it hit the scene, because it didn't make any effort whatsoever to create even mediocre special effects. It's pretty much a home made movie, with home made CGI effects- fashioned after Hitchcock's The Birds, if you can even say that. It's been ranked as the 6th worst movie of all time on imdb. The acting is cheesily bad, and the story is worse. But the kicker is the ridiculous copy and pasted CGI birds that are prevalent throughout the film as the primary antagonist to the main group of people we are following. When the group goes on the run from the killer flock- hitting the road- the one brown haired chick suddenly needs to pee really bad, and- despite being on the run from a killer flock of birds- refuses to go in front of the guys. So she heads off behind some bushes, where she is inevitably humped to death by the worst CGI bird you've ever seen in your life...while taking a squat. Birdemic has already spawned a sequel, called "Birdemic 2: Resurrection".