I'd say that was the point in the gaming session when the DM just kinda stares at the player.
Player: "I'm casting Weather Control"
DM: (wrinkles brow) "Okay, what do you want to do?"
Player: "Create a huge lightning bolt, but concentrate all the thunder in a 10' radius, centered on Leaky."
DM: (agog) (sputter) "Allright, somebody get me a Player's Handbook. WITH Errata!"
That's it!
There aren't really any exclusive or original ideas on TVTropes. That's kind of the point.
- Nerd-o-rama.
Avatar by kpenguin, who is gratefully acknowledged!