I wasn't too sure at first, because I couldn't pick out the explosions that were supposedly going off, but further in to the video when they're looking at the collapse of the second tower, the pre-collapse detonations are pretty damn obvious.

They also do some comparisons of the collapses against objects falling through the air and through a vacuum that are pretty interesting, as well as examining the fact that the debris was pushed upward and outward from the building during the collapse. Something I haven't seen anyone else examine.

Anyway, pretty good stuff, not spectactular, but definitely worth viewing.

www.911eyewitness.com