I can't work out whether she was being unreasonable, or I was ...
I was loading my shopping onto the conveyor belt at Wilkinsons yesterday. I was in a queue of about 3 people - it wasn't busy. Had 2 big packs of nappies, some cleaning supplies and a colouring book for DD1. Shop assistant asked if I wanted a bag, I said yes (had forgotten the one I usually bring) and then shop assistant gave me a tiny bag. I explained that my stuff would not fit in the tiny bag. Shop assistant found me a larger bag and resumed scanning stuff; I resumed packing it.
At this point, the woman behind me in the queue began removing my shopping from my basket and putting it on the conveyor belt by the armful, saying crossly, "I'm in a massive hurry, and it looks like you're going in slow motion". I don't know whether she was talking to the shop assistant or me - we were both moving at a pretty average speed as far as I know. I can understand her being frustrated if she was running late but I can't imagine reaching into someone else's shopping basket and removing all their stuff.
I'm not massively offended or anything, although in her haste she did drop quite a few of my items off the edge of the belt. AIBU to be surprised by this, or was this a perfectly reasonable thing to do in the circumstances?