double kindness
one time i was at the burger spot next to my school and i got my food. i was about to pay, but then i realised i was 50c or so short. the co-owner who was also the cashier told me i was short, so i was about to return the food, but then the guy behind me offered to pay. but THEN the cashier told me it was fine, and i got the food without anyone having to pay.