I've always loved this song, and I think it's amazing that Al and the boys can take on a new genre (a capella) and do it so it well! I really hope they do another one soon.
I listened to the karaoke version for the first time while I was driving and that was a big mistake! I nearly got in an accident because I was laughing hard at the "been in a buttload of pain" part.
Wishing you a Twisted Christmas and a Twisted New Year!