I couldn’t find the word “zoom” in the NTSB document. I did look at graphs of the simulations the NTSB had done of the main wreckage path. It doesn’t look like much of a zoom to me. The paths look compatible with mathematics and physics. The main wreckage followed a ballistic path once it started breaking apart.
The two cartoon demos of what happened produced by both the CIA and the NTSB both included a zoom climb up to a far higher altitude than the initiating event. The CIA's cartoon took it to 3800 feet higher and the NTSB's took it 1200 feet higher. Both claimed 18 seconds of climb. The math doesn't and cannot support either, nor was there any time in a ballistic trajectory for a climb to any altitude which would have required an additional 18 seconds to fall back to the initiating altitude before falling the rest of the way into the ocean. . . which had the climb and additional distance for the fall been added, also would have placed it in a different place in the ocean than where it did finally come to a rest.
The NOAA research vessel Rude, used the 13,800 foot known altitude of the initiating event of the TWA-800 disaster, the last known ground speed, and the known pre-disaster trajectory, and did not included any climb at all, and using a ballistic computer, calculated a ballistic fall and sailed to the calculated landing of that ballistic fall, and found the main body of the aircraft exactly at the predicted location. Ergo, no climb, no higher altitude for starting point, no greater distance.
Ergo, it did not happen.