If the self checkout spazzes put and needs me to get an assistant, that's the last thing I scan at the checkout. Lady comes over, overrides the fail, I say thank you, pay for the stuff while she's standing there, and put it back in the trolley with the stuff I didn't scan yet. You see, I was so frazzled and confused by the disruption that I forgot I still had things to scan. Plausible deniability, I never hid anything, it was all out in the open, and the lady was just standing there. If she mentions it, then I can just resume scanning those items and pay for them too. This has not happened in several dozen grocery trips.

I just get so anxious and confused so easily!