I told him:
Could you tell me exactly why the pressure pulse from the massive fuel-air explosion from the impact of UA 175 could not be responsible for the observed phenomena?
Because I see no compelling reason whatsoever why I should believe anything else at this point.
To which he replied the following:
Yes I can, 6 times!
1) a pressure pulse will push things, not pull.
2) the classic air-fuel explosion typically requires dispersal of the fuel in a mist over a large area prior to ignition, and that is not what occurred.
3) a flash immediately precedes ejection of black smoke from a new area:
4) the smoke peeling upwards in regions above and surrounding the puffs is unaffected, and
5) a flame blows out a window on the opposite face, while the smoke peeling upwards on that side remains unpulled:
6) the jet-fuel explosion hasn't even had a chance to expand before these thing occur:
small frames from Xenomorph911WTC's compilation on the subject:
Now, w.r.t. (6), this is a still from Xenomorph911WTC/Nate Flach's compilation, which starts with an interview with FDNY luitenant John Schroeder, proceeds with one angle and a replay with zoom, another angle and a replay with zoom, and then arrives at the clip the still is taken from.
This clip, like many, is filmed from a worm's eye perspective in relation to the WTC, and a building is blocking the view of the camera. The clip following it is similar in perspective and location, including a building blocking view. In all cases, the objective is to make it look like the protruding flame on the west facade is succeeded, not preceded, by the impact of UA 175, thereby probably eliminating a causal relationship.
Yet, (6) can be quickly dealt with: in this other compilation by Nate Flach:
The third clip in this compilation is labeled "3. CBS LIVE (CBS What We Saw DVD)" by Justin Keogh, and shows that the fire expulsion does occur simultaneously with, or shortly after UA175 impact.
So, eliminating (6), (1) through (5) remain.
Any comments/ideas? What are the characteristics of a fuel/air explosion? Will it pull, then push? Is there any literature on the subject?