Last night I was at the grocery store at 11:00pm and there was a man in front of me in line, he tried to pay with a check but did not have his ID so they would not accept the check. His name matched up with his phone # account but the manager told him he needed to go home to get his ID and come back.
His bill was about $10 so as he walked out of the store frustrated. I added his groceries to mine and paid for it in full, a bagger went out to tell the guy before he left. I was just getting to my car as he walked out with a confused look on his face, and the bagger pointed me out before I could get away.
He came over and said thank you and that was the nicest thing that has happened to him in quite some time. He asked for my address and told me he owned a winery and was shipping a case of wine to my house today. I know the $10 could have been spent "wiser" but using it to make somebody's day better was well worth it to me, even before I knew it would pay off with a case of wine.
Cheers!