I had one time when the cashier was being a bitch to me. I tend to be anal how I put the groceries on the conveyor belt. I make sure they are in groups and in order...all nice and neat to make it easier on the cashier when my food reaches them.
Well the conveyor belt, one time, didn't stop on time and the customer's stuff, who was still before me, had a crap load of stuff piled on the belt. Everything tumbled down my way knocking down boxes and other such things I had so neatly placed. Well after his stuff was cleared up it was my turn. I didn't have time to rearrange my stuff. The cashier snapped at me (not the other customer mind you) about not having my stuff neat for her to pick things up. She told me to my face, "couldn't you have this easier for me to pick up?" I was so pissed off. I was already annoyed the the guys stuff was so disorganized that it stumbled on to my stuff, but that she felt it necessary to snap at me when it wasn't my fault. Luckily I didn't have any eggs that time because she kind of tossed my stuff into the bags.
Look, I know it's not easy work. I've never been mean to a cashier at a grocery store. I didn't even say anything to this cranky cashier, but that was uncalled for. All I said in return was, "It was neat until that guy's stuff spilled over." I don't think she cared. I'm still nice, but I just keep thinking about that incident. I think at the time, I was starting to feel my efforts to be more than nice were going unnoticed in other parts of my life, and that was the last straw.
I became a cashier at Nobody Beats the Wiz sometime after college. I tell ya, even they don't get any breaks. The customers were ok for the most part. My problem really was with my supervisor. But sometimes the customers weren't so easy to deal with.