The title's just a little indication of how weird the humor is in this one. Give the first few pages a read, you'll be hooked.
David Wong also writes for Cracked and does a bunch of those lists, so you know he's a funny motherfucker. As for horror, it's got plenty. It's like if Fear and Loathing were done from the point of view of the guys from Supernatural, if they were lowlifes and drug addicts.