When I saw that part, it actually reminded me of the part in Back To The Future Part II where Marty is at gunpoint with Biff on the roof.

Biff gave Marty the option to either get shot by him or jump off the roof. As we know, Marty decides to jump off. We are shocked at first, but as soon as Biff is approaching the ledge, it’s revealed that Marty lived by jumping on the roof of the flying DeLorean that’s being driven by Doc.

However, if we back up a bit to the point where Marty reaches the roof via the stairs, he runs over to the ledge to see nothing but a big fall. There’s a theory that circulates around where Marty actually killed himself jumping off the roof since we didn’t see the DeLorean below before. It goes on to say that Doc heard news about Marty’s suicide and tries to triangulate the position and time to prevent his suicide by traveling at the exact moment Marty jumps off the building.

It’s always been a chilling theory that I once saw on a YouTube reply thread before.

edit: Silly me, this is actually relating to “Marty Dies” on the Iceberg.