In some European supermarkets, you can borrow a scan gun and scan things as you put them in your bag. Then you use the self checkout machine for payment. Someti

In some European supermarkets, you can borrow a scan gun and scan things as you put them in your bag. Then you use the self checkout machine for payment. Sometimes you get flagged for verification, and an employee has to scan X random items. It's very smooth, especially with card-only terminals.