The players are breaking into a castle, and the GM is trying to figure out where they're going to come out. He makes the classic mistake of rolling for what room they enter.

GM: "Alright, looking up, you can see a window opened. You make your way towards it and climb on in. You find yourself in..."
GM: *Rolls Dice and checks map*
GM: A cleaning closet. So the smell of bleach and cleaning chemicals fills the air. And... wait... a second..."
GM: *Reads the section a little more carefully*
GM: "I misread this. You didn't come out into a cleaning closet, you came out into the security center for the entire castle."
Krieger (OC): We failed upwards this whole time!