I was checking out at the local Albertsons with just a few items and the lady behind me put her things on the belt close to mine.
I picked up one of those "Dividers" that they keep by the cash register and placed it between our things so they wouldn't get mixed.
After the check-out kid had scanned all of my items, he picked up the "Divider" looked it all over for the bar code so he could scan it. Not finding the bar code, he said to me, "Do you know how much this is?"
A little astounded, I said to him, "I've changed my mind; I don't think I'll buy that today."
He said "OK," then I paid him for my things and left.