Bert & Ernie in Caveman Days.
It's funny that Ernie plays the father and Bert plays the son, because it's the opposite of what you'd expect. I love the bone on Bert's head and his weird little teeth. I love that fact that Ernie gets his nose caught in the door at the very beginning.
It sounds like Henson and Oz had a lot of fun making up new, funny variations on the "ooga-booga-booga" noise.
Perhaps I'm overthinking things, but if cars haven't been invented yet, then what was that honking thing that just went by?
"Right on, Dad." I love it when Bert uses his hep, far-out lingo.