Coworker One: The vending machine is giving out Susan B. Anthony coins.
Coworker two: Mm?
Coworker One: Yeah. I put in a five, and got four of these back as change. It usually gives you those Sacagawea coins–I’ve never seen it give Susan B’s before.
Coworker two: I’ve never seen a Susan B. Anthony coin in my life.
Coworker One: Really? Here, take a look.
Coworker two: Thanks.
Coworker One: You can go ahead and keep it, if you want.
Coworker two: Okay, cool.
{Long pause}
Coworker One: Hey, wait a minute: I just gave you a dollar.