Ok, funniest Bert and Ernie moment to me was an old one from the early days. Ernie tells Bert that he wrote a note for him and tries to find it. He rummages through the waste basket, throwing trash all over the place, then through the laundry basket, throwing clothes all over the place, and then the toy box, throwing all the toys out, until Ernie finds the note in his pocket. The note read, "Dear Bert, this is a note to remind you that it is your turn to clean the apartment."
I always thought it was funny