I so wimp out on this movie

Usually horror movies don't do anything for me. You're talking to the person that fell asleep *during* the bloodier parts of Scream.

So why am I watching Pitch Black when this movie gives me the creeps? Or rather trying to watch it. For the first 3/4 of the movie I kept channel surfing. Now I've just given up on the surfing. And the beasties still give me the creeps.