He has a song called "Kill EVERYBODY". As if the title wasn't enough, the high-pitched voice singing "I want to kill everybody in the world...I want to eat your heart" is pretty damn unnerving. If you listen closely, at the part where it first says "I... want to eat your heart...", you can then hear what, to some, sounds like the licking of teeth and lips.
His remix of "Born This Way", where the central melody is made from manipulation of what seems to be somebody screaming...But you can't really tell what it is. Also the biggest case of Mood Whiplash of any of his music period, since the rest of the song is quite normal.
"Scatta". Just what the Hell Is That Noise that forms the bassline? It's like a Decepticon being murdered!
The second video for Breakn' a Sweat turns into this in the section of the video where the weird grey fanged elf-alien things end up on Earth. One of them is pregnant and goes into labor there. The way the video ends is nauseating, albeit with Gory Discretion Shot.