Amazing Skyrim Story Engine

Don't want to reveal any spoilers, but when talking with a friend about Skyrim and he shared that at one point in the game, if you kill a main character in an abandoned shack, it will spawn a whole new set of quests.  When I was at that point in the game, it never even occurred to me to do that.  It's amazing that the Skyrim developers programmed that alternate storyline in.