I had one, one time... this girl asked if we had a whole "crate of corn" she could buy. On my way to the back to check, another customer stops me with a question for a different department. This always happens, and then I get sidetracked. So I get her some help, and then return to the door to go in the back and see about the corn when a guy approaches me with an accent (Eastern European, maybe?) and he's all bowed up and angrily asking if I have that crate of corn and saying that if I don't have it to just say so but don't waste his time. lol I thought he was going to punch me over some corn. I just had to laugh it off though, because a guy that gets that mad and confrontational over corn isn't gonna last long. Not long before he gets beat up, killed, or gets a criminal record.