Gah. Ever had a game where someone says or does something so damn obvious you wonder why it took so long to think of and why it wasn't you who came up with t? It needn't be spectacularly outlandish; in fact, the more every-day, the better.
A few days ago, we were playing V:tM (Heresy, yes, I know ) and we had to break into a fiendish puzzle-locked chest-of drawers. So after opening the first drawer, and being about to close it to open the next, I say...
"Wait. Take it out completely."
GM: "Huh? What? Why?"
Me: "So we can looki into the next drawer. And then we can open the locking mechanism from inside and keep going."
GM: "Shut up. I hate you."