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Haha, yes, a joke.

Haha, I certainly am not prepping the underground gas chambers for our insidious plot, hahaha. It's all just a big joke, like asking you how much Hydrogen Cyanide would you need, haha. Why would someone ever ask a silly question like that? Haha.

(My god, typing that out made me keep thinking of Tommy Wiseau's laugh from The Room.)