that a man, alone in a car, drove up to a teller window at the Lone Star National Bank in Texas. He slipped the teller a note. Exactly what it said has not been revealed, but it caused the teller to hand him an undetermined amount of cash. He then drove away. At no point did the man display a weapon.
Big Gary asks: But if you just say, "Give me money," and you don't display a weapon, and you aren't in any position to hurt anybody, it's not really a robbery, it's a gift, right?
I don't think so. I'm pretty sure it's illegal to lead a bank teller to believe you may be trying to rob the bank, even if you're joking or make no specific threat. (Though specific laws probably vary state by state.) After all, how does the teller know you're not serious, or that you don't have a bomb wired to you?
In the April Fool's Day Database I record a case from 2006
in which a 57-year-old woman walked into a bank on April 1st and handed the teller a note that said, "I'm here to take money." It was a joke. She was there to withdraw money (legally) from her own account. Nevertheless, the police later tracked her down and charged her with disorderly conduct.
Banks are kinda like airports. All potential security threats are taken seriously. Even jokes.