I know the X won't do it but sheesh,what a sight!! I saw a semi truck (Autocar) at a delivery site once that did somthing amazing. The driver inadvertantly let the truck start rolling backward when he was in a forward gear, it emitted a horrible noise and then began smoking somthing horrendous. Turns out that the engine (cant remember the make) can end up running backwards in this situation. It turns the exhaust into an intake and intake into exhaust etc. It equals instant death for the air filter but supposidly thats it.
