We went to the supermarket today. No big deal: veg, milk, bits and pieces. The self-checkout queues were the shortest. All going well until the lady in the machine started on at us, 'the bag is too heavy for the bought items'. Course we started talking back, a touch frustrated 'We've done everything right.' Clearly we hadn't. People beginning to stack up behind us. The flesh-and-blood automatic checkout lady came to rescue us, resigned but polite, 'Please don't lean on the bag.' I'd been taking my weight with my elbow on an upright that holds the plastic bag handles.
Maybe there should be a script for the lady in the machine along the lines of 'Do you really want to buy a television?'