Stop Throwing Money At Me!!

I’m sorry. Idiots tend to think that people who perform a service for them are their servants. I would make sure that your prescribed method of dealing with throwers is OK with your boss, and then bean the hell out of the ingrates. I apologize on behalf of humankind.

Oh, thank you so much. You, and any other cashier that hands back change in this way, are my hero.

That’d happen occasionally to me when I worked in a deli.

If you have your hand out, you could simply keep your hand out until they hand you the money like a normal human. And if they don’t they’ll probably get pissed off and leave, which, IMO, works too.