You read it wrong Rokke. You should have researched a bit furthur into the radar graphics.
The aircraft's speed was 350 knots between the INIATING event at 20:31:12 and its position at point 1 at 20:31:16. From point 1 to point 2 at 20:31:21, its speed had INCREASED to an average of 395 knots over that time. That is an INCREASE of 45 knots. Hate to tell you this, but an INCREASE in airspeed does not allow for a zoom climb...
The NTSB believes the nose fell off at 8:31:16. In less than 5 seconds, TWA 800 has slowed 64 knots. That despite having the momemtum of a 747 travelling 385knots. That isn't inconsiderable.
Considering you misinterpreted the data, where the airspeed INCREASED by 45 knots rather than slowed down as you assert, the zoom climb didn't happen.
For a much more thorough analysis with even more charts and links, refer to post #476