Should I also watch Loose Change because it's compelling and would leave me flabbergasted if I didn't do any other research?

Well they’re not the same thing at all so your rhetorical comparison shows your lack of good faith in the question.

One of the two kids who the documentary follows makes an outrageous claim that we already know is fake based on the word of the person who allegedly experienced it.

What? Try that again.

I'm not going to waste tons of time on a subject I don't care about by watching a documentary that I already know includes a major falsehood from one of the primary subjects.

So you don’t care and you’re wrong and don’t want to see it. Got it.

Honestly, I wasted more of my life on this subject than I wanted just responding here, so duces.

Just have a habit of shitting in threads about things you don’t care about, eh. Yeah. Alright then.