I would totally put it in some random ladies purse and then be like "hey you stole my dollar" and then I would sue her for like a thousand dollars.
Bringing somebody to court too sue them would cost well over 1000 dollars so it wouldn't be worth it anyways, not to mention that nobody would care if it's just one dollar.
I would buy a bag of chips because I would probably hungry. If I wasn't hungry, I would still buy chips to save for later... What an exciting answer ! ...lol