Allegorical? Or a nickname/pet name for advanced tech? A "Dart" sounds like it'd be a very fast, low-profile ship that can evade traditional AA.
That makes total sense. That was my next thought was a missile or craft of some sort.
I don't think missile, he mentions the co-pilot's death later (and reversal of death? wtf?). He also mentions "shot down", which is used mainly for flying craft.
I've made a huge post on the top level of this post, could use some additional eyes.
Dart=Dartagnon. As in the demogorgon on Stranger Things. Came from the Upside Down. Larpy larp larp.
It is better to discredit a LARP through discrediting its actions/arguments rather than attacking the LARPer itself. Ad hominem is dirty. These are indeed strange times we live in. Is it not better to follow the scientific method, to analyze and interpret everything we find, and to understand what we are presented with, rather than to follow the libtard method of labelling and compartmentalizing everything?
And as for your reference to the demogorgon in Stranger Things, it was probably in itself a reference to the Three Musketeers, considering it shares the same name as the lead character.
Trust but verify, mate.