[sudosysgen]

> Most of the eyewitnesses were over the horizon from any potential launch site.

Yes, you will still see it ascend over the horizon. Not so for a level plane.

>A tail-heavy half of a 747 could absolutely go vertical for a bit with the entire nose missing.

No, it can't. In the unlikely event that it can keep from stalling, a positive feedback loop from being aerodynamically unstable would send it in a spin. It wouldn't be able to pitch up for more than a few seconds before spinning wildly or disintegrating from aerodynamic forces. Most likely it is already in a state of stall and basically in a fall.

> People largely reported hearing an explosion, not a sonic boom.

Sonic booms sound just like explosions. Here is what a high supersonic to hypersonic missile sounds like : https://youtube.com/shorts/QknqE1IIgHc?feature=share

[ceejayoz]

> Yes, you will still see it ascend over the horizon.

You notice something out to sea. It's a lit object rising up into the air. There's then an explosion. This describes both "missile hits plane" and "burning plane flying upwards explodes".

> No, it can't.

I mean, tell that to the NTSB, who didn't have much objection to the CIA's theory. Or the world's community of aviation engineers, who a) weren't part of the conspiracy and b) didn't riot over something you're claiming is obviously impossible.

Essentially, it did this, but at a much higher starting speed: https://www.youtube.com/watch?v=7sUWC2jfjqI

> In the unlikely event that it can keep from stalling...

Yes, it would stall. If you want to stall a plane, one of the easiest ways ways is to pitch up sharply.

> It wouldn't be able to pitch up for more than a few seconds before spinning wildly or disintegrating from aerodynamic forces.

Yes, that's the ka-boom part of what was seen. There's an animation based on the reconstruction at https://imgur.com/a/zin7CRo that demonstrates this, exactly as you describe - pitch up, flip over, disintegrate.

> Sonic booms sound just like explosions.

Then we agree that "people said it sounded like a missile" is not meaningful.