mwahaha! Americans encountering our unfiltered, brutal, German efficiency ... you better start learning how to pack your groceries at the checkout at German speeds ... see https://www.youtube.com/watch?v=1LfkwjJdITA
We have a place called WincCo here that has a divider. The cashier sends your groceries down one side and when they are done ringing your stuff up they slide the divider over and send the next persons stuff down the other side while you bag yours.