personally i think its wank made by people looking for things that just aint there... very well put together but clutching at straws...

if a plane crashed into my house there would be explosions afterwards... id be more supprised if there wasnt explosions.

as for the ground floor...

take a stick and put it in the ground and kick the top of the stick... the part in the ground gets the main force of movments.

the people who made the steel claimed it should have tood the blast... WOW i wonder why

all in all intresting video but for me it dosnt prove anything except if you have an official sounding voice like the guy narrating you can make anything sound like fact