When I worked at Sears a few years ago, this lady customer came in with her kid who started to run around and had a good time doing it. His mom became infuriated and grabbed him and spanked him not once, but several times right in the middle of the store, yelling at him all the while. It was pretty late and not many people were there, but I'm pretty sure that everyone in was was in the store heard her.

Not much later she came up to the register to check out. It was insanely awkward.