The 'Beans' cutscene in Skullmonkeys. Klaymen finds a can of beans and starts eating, as a evil-looking skullmonkey is creeping up. Klay finishes, farts through his antenna, and flees when he sees the monkey...whose head melts from the methane.
The "Klogg is dead" song (Watch it here, but beware spoilers !) from Skullmonkeys.