I Got 99 Problems And Your Change Is One

(A customer comes in to buy a key for a car. I make the key, and the total comes to $5.01, and he gives me $6.00. I ask him if he has a penny or nickel so that I do not have to dump a lot of change on him. He says no, so I give him 99 cents in change. Less than five minutes later, he returns.)

Customer: “That key worked really well. When I went elsewhere they could not get one to work, so I want another one.”

(I make another key, and of course it is the same price.)

Customer: “Here is six dollars.”

Me: “Can you give me a penny?”

Customer: “I have no change.”

Me: “Didn’t I just give you 99 cents in change?”

Customer: “Oh, right.” *hands me a penny*

(I have no idea what he was thinking.)