Earliest west face ejections seen from the south
The earliest ejections from the west face as seen from the south:
The airplane impact hole is visible. The earliest ejections appear to come from around floor 80 when compared to the graphic below.
Further development of the ejections:
Slow-motion video of the collapse from the south shows this process clearly:
https://www.youtube.com/v/6t_Vg0Lx0aY?version=3
Earliest west face ejections as seen from below
2 still frames from a video show the genral locations of the earliest visible ejections:
Slow-motion video of the earliest ejections shown backwards. Backward motion allows the viewer to locate the earliest ejections relative to the large perimeter panels that are ejected from the building and seen to go into free-fall.
https://www.youtube.com/v/sLmlgR1rvuU?version=3
Note the earliest ejections on both the left and right sides of the west wall.
Ejections below the 75-77th fl MER panels
The red and blue lines mark the base of the beam flooring of the 75th fl mechanical equipment room (MER).
The 2 large corner MER perimeter sheets connected to this flooring is ejected from the building with considerable force during the next series of images.
The MER corner piece marked by the green line will go into free-fall down the NW coner of the building, spinning as it falls.
In the next photo the NW corner is being ejected from the building.
The first sign of a large MER perimeter sheet emerges from the dust (red circle).
The white arrow marks a light colored ejection. The evolution of the light colored ejection allows the viewer to determine how images during these moments are sequenced.
