North Tower Plume Formation

In this video video.google.com... as the tower falls most of the smoke dust gets sucked down with the falling building, i heard in another post that this is the effect of a vacum that is created as the building falls.

As i watched the film i noticed that as everything is being sucked down into the vacum a strange formation of dust/smoke is ejected in the top right corner of the film.

What could possibly cause this phenomena?

[edit on 15-3-2007 by Rotator]

Would anybody care to comment?

No contest.?

What other than a explosive device could possibly make a plume form above the collapsing building?

Are we supossed to be denying ignorance or promoting ignorance?

I am starting to believe this site is nothing but disinfo.

If you're watching the same plume as me, I don't think it's due to an explosive device as such. I don't see anything being ejected with any force. To me it just looks like smoke etc that was not caught up in the vacuum of the falling building... and of course with no building there any more the smoke just propagates differently.

Unless of course I wasn't watching the same plume you are talking about.

The plume i see is not carried by the wind like the rest of the smoke.
It forms into the prevailing wind. It must have been caused by an explosion.
When the film stops it is the ball of smoke in the top right corner of the screen.