I've done something similar... small town like 2-3 grocery stores maybe... the sister I was with had this rewards card and once you fill it out completely, you get a prize, she (mistakenly) gave it to me to WIN!! Since I would probably never go to this store again I went overboard!! We won one single dollar (CI$)! I started scream/yelling like I had just been picked for the Price is Right! Good Times, Good times!! :D
HAHAHAHAHA we did that in vegas one time. i won like $3 on one of the slot machines and we were jumping up and down screaming and peeps came over all excited and said "OMG how much did you win" and i said "OMG I WON THREEEEEE DOLLLARS!!!!!" LOL