My mum was telling me this story today.
A group of about 7 (including my mum) went to a local Indian Restaurant last night. The bill tallied up to about $300. However when they went to pay someone who had been there earlier in the evening paid it for them. Just a total stranger who told the restaurant staff that they looked like they were having such a good time he would pay their bill for them.
Apparently he has also done it at that restaurant twice before.
Quite amazing. And a very nice thing to do.
Has this ever happened to you?