These, "eye witness" accounts are to be carefully considered.
For example, the film showing the second jet hitting WTC #2 looked to me as-if it'd flown from the perspective of the person holding the camera & into the building; to me.
Truth was, that jet was coming toward the person holding the camera, & went behind the building & the camera's view; then crashed into the building.
The brain creates an optical illusion of things not normally in the conscious mind.
I'd have to believe the sight of a crashing 767 air bus would qualify as something quite extraordinary, as *normal* events would go.
A crutch of many conspiracy theories is the foil hatter belief ALL eyewitness reports are 100% infallible and they only way a report can be wrong is if the witness is a liar or insane, thus when you question the eyewitness report you're questioning the credibility of the witness.
Also, eyewitness reports can be badly skewed if the eyewitness is not interviewed correctly (it's easy to subconsiously "lead" a witness into telling you what you want to hear) or if the eyewitness is "contaminated" by hearing other eyewitness reports.