I was just shortchanged at the grocery store, by $5. Nice feeling, that the guy's not going to believe you. But I said UHH before he was 10 steps away and he came back and, thankfully, believed me. Also he said he was so sorry about it, so I won't be boycotting that store, which I would be if he gave me the slightest grief about it.
That's what happens when they don't count back your change but just give it to you as a lump sum. Idiots.