Ms. Anthrope's Long Phone Hold

George and Harold need to sneak past Mr. Krupp's secretary Ms. Anthrope, so they call her and pretend that she's won a contest and needs to be on hold to claim her prize, so they play the phone next to some on hold music; she spends the entire rest of of the movie listening to the phone, which must have been at least half a week. The Stinger has George and Harold realize that they forgot that she's still on hold and when they talk phone again, she accidentally hangs up, which enrages her.

Example of:
Ridiculously Long Phone Hold