My wife utilizes one of the few remaining full service stations. She is under strict orders to tell the jockeys there to STOP AT THE FIRST CLICK!!! Since this is a co-op we belong to, they are well trained.
However, I’ve seen gas jockeys try to get an even number of dollars in so they don’t have to make change. I’ve even seen them spill the last bit of gas ON THE GROUND just to get the dollars even on the pump.