I bring this up because I just rewatched Silence in the Library, where the final spoken line is very much this - and because my mind works in weird ways, I was reminded of a time where I actually pulled this off in a gaming session. And finally I've gotten to the point - congratulations to those of you who made it this far

We were playing a game called Beyond the Wall (a game that's a mix of D&D 3.5 and some OSR elements, designed for running one off sessions on zero prep), and at one point we were discussing what we could do with a large amount of money. One of the other players mentioned that we could build a wall around the village, at which point I said something along the lines of "Yeah; to protect the village from that which lies beyond it". After the GM stopped laughing long enough to speak, he gave me a fortune point for making him laugh while staying in character, and we continued play.
So, basically, I was wondering how badly people had abused the fourth wall without actually breaking it in game - or, of course, any other funny gaming stories.