An interesting clip from

Counter-flow: Why does the dust cloud flow back into the center of the collapse?

Some thoughts on an interesting clip from MANY HI-RESOLUTION VIDEOS OF THE 9/11 :

Along with the nice dust squibs, something very interesting happens in this video beginning almost exactly at the 5 second mark - at the same time that the camera pans down slightly. This is the most striking example I have seen of the "counter-flow" phenomenon, where dust flom the debris cloud is sucked back into the center of the collapse as if being pulled into the sub-basements.

If you watch it in slo-mo you can see that the thick dust trails streaming back from the larger pieces as they fall are not drifting down in the wake of the pieces, but are actually flowing up and back toward the centerline of the tower. It almost looks like the video is playing backwards... I realize that some of this is only apparent movement caused by the camera panning down, but at least at the beginning there really is a backwards flow of the thick dust, as if it's being vacuumed away from the pieces. More about those thick (as in coarse powdered metal) dust trails: http://st12.startlogic.com/~xenonpup/dust%20trails/

The counterflow seems to start at the same time that the "atomic glow" lights up the left side of the frame, making me think that the two are related. Probably not a thermobaric device in the traditional sense of dispersing a cloud of fuel and then igniting it but similar in principle, maybe the fabled a-neutronic bomb:

"Riconosciuto's talents were much in demand. He had created the a-neutronic bomb (or "Electro-Hydrodynamic Gaseous Fuel Device"), which sank the ground level of the Nevada test site by 30 feet when a prototype was tested. Samuel Cohen, the inventor of the neutron bomb, said of Riconosciuto: "I've spoken to Michael Riconosciuto (the inventor of the a-neutronic bomb) and he's an extraordinarily bright guy. I also have a hunch, which I can't prove, that they both (Riconosciuto and Lavos, his partner) indirectly work for the CIA."

Riconosciuto's bomb made suitcase nukes obsolete, because it achieved near-atomic explosive yields, but could be more easily minaturized. You could have a suitcase a-neutronic bomb, or a briefcase a-neutronic bomb, or simply a lady's purse a-neutronic bomb. Or just pull out your wallet for identification and... The Meridian Arms Corporation, as well as the Universities of California and Chicago owned a piece of the technology." http://educate-yourself.org/cn/2001/riconosciutoandtimosman8nov01.shtml

This clip shows the South Tower collapse from the north, with WTC-1 in the right foreground blocking part of the view. Starting about two seconds into the clip there is a very clear flow of the dust cloud down and toward the right, back toward the centerline of the building and down toward the basement.

Pup writes:

> It almost looks like the video is playing backwards...

Funny you should say that, I have noticed for some time that when I run the
ST demolition backward
(Region 1 Naudet 911 DVD clock marker 0:52:15)
a good deal of it looks EXplosive, like a FORWARD explosion.
Your post makes me want to spell it out.

It looks like a healthy tower is being formed from the ground up. Of course.

Then, just above that rising healthy portion, the lower half or two thirds
of the rising dust cloud looks implosive, as expected.

But just above that, in the more mushroom-cap area, the upper half or third
of the rising dust cloud looks EXplosive.

Played BACKWARD, the rising TOP of the dust cloud EXplodes OUT,
and then FALLS DOWN,
and then RISES IMplodingly toward the core column area, where it (the
dust) forms into the shiny new rising top area of the growing healthy
portion of the tower.

It looks like the rising healthy portion is shooting dust up from its
core area. These "ejections" (as seen when played backward) loop out,
down, back up, and back into the rising tower, becoming the tower as
its height grows.

I find it horribly fascinating to watch.

Thank you for spelling out that the dust cloud on the ground would have
been WAY MORE massive if it hadn't been for this anomalous vacuum action.

There may also be core-spire-column disintegrations to tease out
with enhancement.

> I realize that some of this is only apparent movement caused by the
> camera panning down,

In N911 it's an airborne shot from the south over the harbor. It does
a steady moderate zoomout during the demolition. A 'copter maybe a mile
south of the Battery, I figure.

Ray