There are isolated and localized ejecta that seem to be separate from the visible collapse front.
There are times when the collapse front can be seen moving down floors in a rather uniform way and quite predictably and one single isolated ejection will emerge that seems of a different source.
This is an example from WTC2:
There is a single isolated ejection from one side of a corner office that doesn't move with the rows of ejections.
Here is a glimpse of this same isolated ejection with an odd pair from the other corner:
They do not move with the more predictable collapse front at all.
There are times when the collapse front can be seen moving down floors in a rather uniform way and quite predictably and one single isolated ejection will emerge that seems of a different source.
This is an example from WTC2:
There is a single isolated ejection from one side of a corner office that doesn't move with the rows of ejections.
Here is a glimpse of this same isolated ejection with an odd pair from the other corner:
They do not move with the more predictable collapse front at all.