bat opens up their little bat wallet to find they are all out of moths. A worthless $100 bill flies out for emphasis
From top-of-frame, a month flutters into the wallet. Confused, the bat looks "up" to see an equally-confused human standing "above" her, holding an open wallet containing a single $100 bill.
Camera rotates to reveal bat has been hanging upside down above a human doing the exact same visual gag and each ruined the other's bit.
Laugh track.
All so true. Why is the human Jon Arbuckle