Here's two versions of the same song with the same video. The first is by Aphex Twin, the master of frightening electronic music. This is Aphex Twin's unsettling classic and is the original.
Now here is The Dillenger Escape Plan's version, with the same video. Nightmarish prog-metal...both are devastatingly creepy. Which do you prefer? If I had to choose I would choose The Dillinger Escape Plan, but you can't knock the original either. One of my favorite songs, regardless.