The ending is great too. "I'm goin' to Houston... do the hot dog dance... goin' back to Houston... to get me some pants!"
His performance of "Where It's At" on the show, Live at the Rehearsal Hall. It included cheap Casio keyboard that he told his keyboardist to switch to a different instrument voicing every so often, a Seinfeld-inspired "sitcom bass" solo, and other moments Beck described as "musical crimes." Even Beck couldn't help but crack up during the song.
Towards the end of "Loser", a humorous song on it's own (albeit a bit dark), between the chorus is the glorious "Get crazy with the Cheez-Whiz!". Beautiful.
Another memorably silly ad-lib comes from "Soul Suckin' Jerk (Reject)", an alternate version of "Soul Suckin' Jerk" that was released as a B-Side: "Rockin' the town like a moldy crouton!"