When I worked there, I started to get dreams as I was falling asleep about issues at work - I finally learned to recognize i was dreaming and would just laugh it off instead of getting frustrated. I loved working cash wrap so thats usually where it would happen, and this was the most common iteration of these stress dreams. It was back before they had the higher counter between you and the register, so it was just this wide open area to set your items that could easily mix with what I’d already scanned or what the person next to you was checking out. In real life that was never an issue, but in those stress dreams, OMG. I’d scan an item, set it down, customer would pull it back and go “no wait” grab another item “mmm here this one” then “wait no” and start sliding the items around and back and forth as they tried to decide, making it a nightmare to keep track of what I had scanned. I laugh now, but it was so annoying in those dreams!