I guess we found the grocery maniac.

If they were tired and unable to communicate (happens to us all mate) they would have been okay with their cart being moved. Getting angry at the cart being moved, after saying it was okay to go, is the tell that this person was not capable of polite reason.

Glad the second encounter balanced out the first one. What a maniac.

The only thing that might be a problem is that milk and butter is at the back. But that is actually fine because everyone goes clockwise around the aisles, and there is room to pass, so it flows really easily. You go past all the basics you might need in like a minute.