I remember the one with the cuckoo birds. A man is explaining that a cuckoo clock is about to strike 3:00, and the 3 birds approach with a ladder to enter the clock. They do talk in a sort of 3-stooges style. When they actually chime out the hour, each one says "cuckoo" with a distinctive voice and style. Afterwards, the birds leave the clock, saying as they pass the man:
"Sorry"
"Come on, come on"
"See you in an hour."
The man's final line, against the sound of the still-ticking clock, is "Three cuckoo birds". The accent was on the middle word, half-implying that the birds were "cuckoo" mentally.