I got a good chuckle out of the customer’s reaction though. The clerk rang things through, and created a big space in front of the scanner. A single onion was left behind which was blocking the beam, and not allowing the belt to advance.
The lady in front of me was trying to be helpful and create some space for my items. If I were in that situation I would lift the onion and let the belt advance. This lady had another idea. She moved every single item of hers forward. Not just once either, twice.
I was tempted to say something, but I didn’t want to ruin the humour.