My first job was as a cashier at a local grocery store in high school. Absolutely the reason i am a snob about packing groceries. And yes I miss paper bags. Much more satisfying to pack.
I would often get assigned to work the express lane. Just about every week an old man would come in usually first thing in the morning, buy just a pack of gum, and pay with a $100 bill and expect change. Of course, this was back when it was either cash or check, so I didn't appreciate him wiping out the till. Never understood why the owner didn't set a limit on bill size.
In college I worked at Lowe's. My register was usually the one at the far end of the store. There was an entry door clearly labeled "PULL" but would open if you pushed it. The problem is, doing so caused it to catch on the rug inside, preventing it from opening enough for someone to get through. I lost count of how many times people yelled through the partially open door to tell me that the door was broke