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Originally posted by JibbyJedi
There's definitely a visual/sound difference in this video.
At 1:45 is when the first "sounds" of the tower falling/exploding begin, which kind of sounds like another low flying airplane.
At 1:50 is when the top of the tower appears to be collapsing.
Isn't it usually the visual first, then the sound? Not the case here. The sound lasts for 5 seconds before the tower visually starts falling,
and it's a steady sound too not several "explosions", it sounds more like the steel buckling and breaking all at once.
Originally posted by dashen
Oddly, according to this video it appears that the collapse lasted for almost thirty seconds?
from 1:45 to 2:20 of the video, you can still see a large spire collapsing.