It's especially great when they do something that's completely off the walls crazy. Michael Dorn played a screaming dwarf in the Billy and Mandy episode "Here There Be Dwarves," who went mad after centuries of mushroom farming and exacted his revenge by invading the Keebler elves' hollow tree. Then R. Lee Ermey pops up to censor the carnage and the dwarves and elves compromise by making mushroom cookies, and Billy does karaoke. That show was so delightfully warped and random sometimes.