A lady came through with two suckers. The total was about 30 cents or so. She didn't have the money! So, she said "let me run out to the car!" This took about 10 minutes, and there was a long line of people waiting with carts full of groceries...and since the transaction was open already I could not close it to check them out. She came back in and said she didn't want the suckers anymore and took off...she did not apologize to me or the other customers. I had to then get a manager to void the transaction. That also reduced my rate of scans per minute greatly, so I got a bad rate of productivity on the cashier's report. Dude, as soon as she'd left I'd have just rung it up as though she'd paid cash, set the suckers aside & gone on to the next customer, throwing $.30 of my own in the drawer when convenient.
Well, hindsight is 20/20.
Of course, due to Old Professer's excellent memory, since I apparently mentioned this incident back shortly after the time it occurred a couple of years ago, the fact I have mentioned it again magically means the incident never actually occurred. I should go back and see if they've got my old cashier's report on file...maybe it changed! (you know, like the newspapers on Back to the Future).