You mean like something you grabbed but later on were like nah dont want/cant afford? I usually try to do that but would be lying if I said I had never plucked several items from the bakset/cart and left them to the far side of self checkout to be dealt with by someone else. A few times I've even debited baking soda, a cheap drink or a yeast packet and left the unwanted item at checkout because I couldn't be bothered to drive to the bank/it's cheaper than any other ATM fee availabe. If I see an item on the floor next to the rest of its kin I dont mind picking it up and putting it back but the baby wipes and cold medicine that managed to sneak onto the soup shelf are just gonna stay there not my problem