This is a Stick Up!

Marvin Himmleman and Morty Nussbaum are the two principals of Himmleman & Nussbaum Accounting Associates. The two are in the bank for their monthly meeting with their bank manager when suddenly armed robbers burst in. While several of the robbers take the money from the tellers, others force the customers, including the accountants, up against a wall and proceed to take their wallets, watches, etc.

While this is going on, Himmleman jams something in Nussbaum’s hand. Without looking down, Nussbaum, "What is it?"

To which the Himmleman replies, "It's the $50 I owe you."