Hmmmm....3 pounds eh? Quite a bit! and all the wonderful fumes will make for such a pleasent environment. Thank God not too many people know how to produce or properly apply thermite/thermate....I however am among them ....MMMMUUUAHAHAHAHAHAHAHAHAHAHAAAAAAAAAAAAA!!!!!!
Besides, that's a lot of trouble to go through when you can just pile up some poison ivy around the intake, set on fire....and viola! Natures CS smoke!
Ooooohhh...I digressed...sorry folks, got carried away!
Besides, we all know that someone as competent as Raven would have a high speed cut valve on the intake...LOL!
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"There is no human problem that cannot be solved with an appropriate quantity of High Explosives!"