I'm not sure how your markets work, but at the one I frequent, Let's call it Little Eagle, they have "self check out" cash registers. It's like this: you can scan your own products, and a computer deals with that pesky human interaction of a cashier. This is why I ALWAYS go for the self check out.
Problems come for me when something won't scan, something scans wrong, or the computer decides that it's done with my crap.
When this happens, the light above the register will blink.
It blinks, calling you an idiot, while you wait for a real person to fix your problem. A friendly voice come from the register telling you, "A team member is one the way."
THIS IS WHY I DIDN'T WANT TO GO TO THE NORMAL REGISTERS. TO AVOID HUMAN INTERACTION.
So now I wait awkwardly for a team member to swipe their card, fixing the problem, but inadvertently, and unintentionally, embarrassing me.
This whole process of scanning something wrong, and needing the team member to make the light stop blinking happens about 50% of the time.
I hate the market.