Originally Posted by
grandmastershek
Yay for negative proof!
So what happened exactly? A jet engine was there before the crash and no one saw it? Someone dumped the engine right at the crash and no one noticed? The engine was planted in the building without anyone seeing it and when the explosions went off it ejected it out?
Let's focus on the type and version of the jet engine first, but to briefly answer your question: my theory is that the engine part was planted in one of the WTC towers and made to shoot out of the building like a cannonball by placing explosives behind it.
Listen to the sharp short bang when the engine shoots out of the South Tower like a projectile:
http://www.youtube.com/watch?v=KNRatnY5ymM