Created By: MisterDrBob on August 14, 2011
The villain has the hero captured. The hero makes some protest along the lines of: you don't know what you're unleashing! The villain turns around and states quite explicitly what the hero was going to say, proving that he knows exactly what he's doing, and the hero's pleas don't make a lick of difference. Trope namer is Batman: The Animated Series when Batman tells Ra's al Ghul that his plan will cost countless lives. His reply? "Actually detective, we have counted. 2,056,586,000."
Hello, Unknown Troper. You'll need to get known to lend a hand here.