the Soupy Sales ahow involved Dick Van Patten. If memory serves, it
was a cold opening and the sketch involved variants on the old
"Waiter, there's a fly in my soup!" gag.
Van Patten played the customer and Soupy played the waiter. They went
through the joke a few times, each time with Van Patten setting up the
joke in a different emotional state, as shown on a title card: #1 -
Scared. #2 - Enraged. #3 - Nervous, etc. Soupy would give a different
punchline every time. Finally, though, Van Patten got fed up with the
routine and refused to perform joke #9.
"Why don't you want to do the ninth joke?" Soupy asked.
And of course, Dick Van Patten replied "...because eight is enough!"
If that punchline had been used on any other comedy show (and it
probably was, to the point of overkill) it wouldn't have worked. But
on Soupy's show, and especially after a setup which was entertaining
in its own right, it was great.