Earlier quoted context omitted.
> Everyone has their own strategy of how to place items onto the line to slow down the cashier at just the right moment. I am German and and I've never heard of this ^^. You just put the items on the belt in the order that they should go in the bag, then you can pack very quickly.
> in the order that they should go in the bag That's one of them. Even that is something that you don't usually do outside Germany. To get to the next level I recommend to put weighted produce to the end or just after items that are not straightforward to pack.
> > in the order that they should go in the bag
> is something that you don't usually do outside Germany
That's a basic sign of civilization, after workable plumbing and provision of healthcare.