I went grocery shopping this am ( along with everyone else ) , the store was crowded, their were at least a couple people in every line- I saw a cart, no one with it, no food on the belt

, the kid at the registered just shrugged and said for me to move the cart and put my stuff on the belt, which I did, then after ALL my cart full of groceries was unloaded, another woman came up and moved the cart and started putting her stuff up-- then the owner of the cart came back, arms full of "forgotten" stuff and was MAD!! WTH??? Who does this ?? I have forgotten things and run to get them, if they're close but not if its crazy busy...
Do you think thats inconsiderate and crazy to think no ones going to jump ahead???