Was in waitrose this pm with dd in the trolley, we had left her trike by the checkouts and I left her with the packer (I said "I'm just going to get that trike, pls keep an eye on dd") and went to get it (about 8 paces away)
I walked back and saw dd in the trolley WITH A PLASTIC CARRIER BAG ON HER HEAD
I ran up to her, just as I got there the customer behind me noticed and screamed at the top of her voice - I ripped it off and yelled at dd and she of course burst into tears
I was so angry with the packer - he had moved the trolley with her in it so that she was right next to the end of the next checkout where there were lots of carrier bags. I didn't say anything to him as I didn't trust myself not to punch him