Saw This Once - in 1981- but still remember....
caveman: Zug-Zug.
advanced caveman: Zug-Zug?
caveman (more enthusiastically, making pelvic thrusts): MMMMHHHH!! ZUG-ZUG!!
advanced caveman (dawning comprehension): Ohhh. Okay 'Zug-Zug'.
and let's not forget the giant dragonfly on Ringo's face which his friends helpfully squash!!
and yes I do remember Barbara Bach. Was she not married to Ringo at the time? Some triv masters here might know.