I've always been impressed by the mouth-syncing in this one. Not that it's crazy hard with Bert & Ernie -- their mouths just flap open and shut, so there's no, like, phoneme-matching -- but there is the issue of timing, and it's done well here. Dude musta watched a /lot/ of Bert & Ernie.

It always sounds to me like he's shouting "Apple juice!" at the beginning.