It’s perfectly reasonable for you to put your clothes in a dryer, and it’s perfectly reasonable for you to put four quarters into the dryer, and it’s perfectly reasonable to ask the attendant how long the dryer will run on four quarters, and it’s perfectly reasonable for you to leave for a while when she tells you “about twenty minutes”.

But you really don’t need to tell the attendant “I’ll be back” when you leave.

No one ever thought that you might be a clothes-abandoner, here to drop all of your clothing in a dryer, drop a buck into the slot, then leave, never to be seen again.