Smoke Cloud in Lower Manhattan on 9/11?

About 17 seconds in the left hand bottom of screen what is that smoke cloud?

I dont ever remember seeing that before. Is that from the collapse?
Is this Fake?

Interesting...i think i see what your talking about! Left side of the horizon...smallish black cloud. hmmm.

What area/surrounding buildings is this occuring at? thats quite a ways from the towers! Good find!

[edit on 11-6-2007 by ready4truth]

I just wonder if its fake or real.
According to the video its in Lower Manhattan (South of Wall Street around Hanover Square / Old Slip) area.
If its real thats a big cloud.

Hmmm... Just a couple quick theories...

* Smoke forced through a subway tunnel by the collapse and exiting via a station down the line

* Exhuast plume from a boat in the harbor firing-up its engine

I just went to the YouTube link because I didn't see it at first, but in the comments section of the YouTube page someone says that the cloud can be seen in the Naudet brothers film as well. I wonder if that was one of the exploding vans.

[edit on 11-6-2007 by ipsedixit]