Two lawyers are in a bank...

Two lawyers are in a bank when suddenly armed robbers burst in.

While several of the robbers take the money from the tellers others line the customers (including the lawyers) up against a wall and proceed to take their wallets and other valuables.

While this is going on lawyer one jams something in lawyer two's hand.

Without looking down lawyer number two whispers "What is this?" to which lawyer number one replies, "It's that $20 I owe you."