Alright, so last night, I'm in Mount Hyjal, finishing up the quests I've still got left there, when I overhear a conversation from another player about how he's short some gold for his epic flight skill. Just for the hell of it, I ask how much.. he replies 800g, and seems to be a bit nervous. I open trade and simply hand over that amount; I don't know the guy, and chances are, being a total stranger, he'd prolly never pay me back either.
Regardless, he was happy as hell and repeated "omg!" a few times. I then proceed on my way, content that I've done a good deed for someone I don't even know over the Internet. And then.. a rare spawn appears right in front of me. I think it literally spawned, as it, a phoenix, descended from the sky and flew to the ground ahead. I quickly attack and kill it, a level 81 (I was on my 85 Paladin), and lo and behold, it drops an iLevel 346 superior item.. that is worth a thousand gold.
Queue flipping out and the realization that it was almost as if the game itself was paying me back for being nice. And then I told the guy I just gave the gold to about it, and that the money was no-strings-attached since, well, I now had something which was worth even more then what I gave him.
Yeah, that was pretty awesome.. ;)