“Hands up, this is a robbery!” He declares, as he starts forcing the teller to fill a sack with cash.
One of the customers, cracking slightly under the pressure asks; “Hey, shouldn’t you be robbing a blood bank?”
The vampire turns to them and grins. “No, see, I’m cursed.” He explains.
“Yep, I can only feed on smartasses, and there’s always at least one when I pull this stunt.”