Worst or surprising thing you've find on the shelves during a rumble/facing/just working?

My store was being handed over and there was facing like mad. I was among a group of SM/ASM/DM's from rural store were in a group facing and i was only a month into working for Coles.
They were ripping through it and I was struggling when all of a sudden a white blob in the shadows caught my eye. I grabbed it and lol and behold it was a white plastic bag (not sure where it came from as they hadn't been available for over a year. The customer must have bought it in themselves.).
And inside the plastic bag....... discounted prawn ring, probably 5 days old. During summer. OMFG the smell!! It absolutely reeked. I was gagging and having fits but all the SM's etc didn't even blink an eye, like it was a common occurrence.

So what's yours?