I was NPCing and it was supposed to be a five minute silly encounter that turned into a roomful of crying people.
Elves in NH were cursed to be unable to bear children, but the spirits of those unborn elves were still being created. A couple of elven elders came into town, looking for help because one had attached itself to them... something about beginnings and endings, I suppose.
The PCs were supposed to just put this container against me and hit me, and I'd disappear into the box to help make a thing to defeat the undead BBG of the weekend (which, ironically, I was also playing.)
The PCs decided to talk me into getting in the box, and the first thing they did was ask my name. "I don't get one until I'm born," was my response. They tell me to choose one, and I refuse, repeating that I don't get one until I'm born, because no one will know what I'll be until then. Fifteen minutes later, the woes of the Deadlands had been explained to me, their fighting to fix the lands and rid them of the overwhelming amount of necromancy, the fighting to undo the curses that were plaguing the races... and all the while, they're trying to figure out the most opportune way to ask this spirit that's only the potential of a life to give up all it could be. One woman said she'd do all she could to call me to her, to give me a chance to be born. She would give me a life, and a name.
I agreed, and without a dry eye in the room, let the box overtake me. OOG, I left the building, stumbled out to the parking lot, sat beside my car and bawled my eyes out.
Months later, I check my email while I'm at work, and I get a forward of a writeup. That same elven woman has been given the ability to have a child, and in the vision, it's described that a spirit has been so intently looking for her that it was chosen. I told the kids I was nannying for to finish up homework and then they could go into the playroom, walked to the bathroom, and cried my eyes out a second time.
"It'll be quick and easy, just paint your face white." Ha.