This didn't happen to me, but one of my friends after having one too many beers ended up wandering out into the mountains in the dead of night. While out there she accidently ended up saving a dragon, and in her drunken stupor ended up inviting the dragon to crash at her place. The next morning said dragon took her up on that offer and is now paying back her gratitude by working as a her house maid while assuming a human form. If you want to hear further details...