What’s the biggest PC-driven shift you’ve ever experienced in a campaign? If you were a player, what made you feel like you could successfully change the GM’s world? If you were a GM, was this planned or something the PCs surprised you with?
I’d probably have to give the golden screw aware to Scott Herndon’s affect on my TiHE campaign, in which he presented positive proof that the universe had 10 primary points of power within it, when I was firmly convinced that it was eight. His reasoning for this was so good that I actually went looking for the other two myself and, upon finding them, realized a great deal more about the story than I had previously.