Season 3, Episode 10: "The Stranded"

...and you only gave me change for a 10.

-You gave me a 10. -I'm positive I gave you a 20.

I know what you gave me.

You owe me $10.

Will you please step aside?

-Next! -All right, all right.

Let's just examine the situation for a second.

Who, in this situation, would be more likely to make a mistake?