Probably asking where things are when there's a massive arrow hanging from teh celling saying where it is, like I don't mind helping but I will just point up...specifically bin bags and eggs in my store, also in the summer bugs spray, if I had £1 for every time someone asked for bug spray I wouldn't need to work there.
I actually quite enjoy working in the supermarket, I'm mainly a shelf stacker but am trained in tills and in busy shifts will be on them.