It's not that the guy could not be lifted from his seat that is in question.
It's for how LONG he is "floating" and in what WAY he is "floating."
Think back to how LONG you can feel the lift happening in the ToT elevator car.
The elevator's maximum travel in the "drop shaft" is about 130 feet.
The entire Hotel tower building is a maximum of 190-some feet, including the roof section.
The outer sliding doors (top-most stopping point of the elevator) are much farther down than that.
The exit floor of the ride (one floor below grade) is actually below the "drop section," so, that's not included in the vertical "drop area" either.
So, let's take the very "best/worst case" of a 13-story (give or take) drop.
To reach "zero G" (weightless, but not "rising") would require the elevator to be moving down at 32 feet per second, and INCREASING that speed by that same rate... every second thereafter
Second 1: 20 feet dropped-acceleration (not quite the full 32 feet that first second)
Second 2: 80 feet dropped -weightless and slight floating is achieved.
Second 3: 120 feet dropped- still floating with no deceleration.
Second 4: Person is dead due to elevator hitting the floor of the shaft.
So, THAT's no good.
Let's try again:
Second 1: 20 feet dropped -acceleration (not quite the full 32 feet that first second)
Second 2: 80 feet dropped -weightless
Second 3: 120 feet dropped- deceleration to stop.
Second 4: We've stopped safely this time.
Let's say I'm wrong... REALLY wrong... 50% wrong...
In the worst/best-case, given the physical limitations of the (relatively) small vertical distance...
guests could likely only experience a light lifting for about 1.5 seconds, or so.
I think that's about right, as I recall from my (literally) dozens and dozens of rides on the attraction.
None of the high in the car freely-floating for 2+ seconds, or so, that we see in the video would be possible.
BTW, where's the LIGHT coming from for those 2 seconds where he is ALREADY floating?