(I work at a place where it’s common for customers to pay for the person behind them in the drive-through. I help a customer who intended to pay only for her 4$ drink, but upon hearing that the customer in front of her had paid it, insisted on paying for the 11$ total behind her. The customers with that total pull up, and I notice they are all teenage girls.)
Me: Actually guys, the lady in front of you paid for your order!
Driver: What? Why?
Me: It’s kind of a pay-it-forward thing, it happens pretty often here.
Driver (to her friends): Sweet guys! Free drinks!
(I hand them their four drinks, and ask if they’d like to pay it forward.)
Driver: Why would I? I just saved 11 bucks!
Me: Well have a good day!
Coworker: I get it when someone intends to pay for one drink, and cant afford a huge total of the person behind them. But when that happens it just makes me want to throw things.