Myself and my best mate went to a local pub a couple of years back for a catch up.
Just as it was nearly our turn to be served, a man came into the pub in cycling clothes and a helmet, bit out of breathe from his ride.
The barman then turned to take our order and we asked for a bottle of Pinot, with two glasses. With that, the cyclist piped up behind us said, "Make that two bottles please, but can I have mine unopened, to go and I will pay for both!"
We turned him and said thank you, there's no need. He insisted and paid quickly before we could protest again, told the bar man to keep the change and wished us a lovely evening, before putting his wine in the bag and getting on his bike.
We sat there in shock. He wasn't cracking on to us, didn't want anything in return, just was kind.
We tried to work out his motive, a promotion at work, some good news in the family, a pay rise / bonus, he was on a promise. No idea, but I think he just liked to be nice.