The way i see it, adult Jason was always in this.

[deleted]

Also the window scene is just before she shows up in the jeep, so you could be very well correct and she probably would not have time to do that, go to the jeep and drive it to the cabin.

[deleted]

The jump scare was tacked on, so the writers really did expect us to believe Ms. Voorhees did all that, though. But more importantly, this wasn't a supernatural film at all so Jason had to have been dead. Perhaps even more important than that is that the creators didn't overanalyze or worry about how Voorhees can have strength to do this and that or jump around in location. They could not have predicted nor did they ever expect people to give it this much thought 37 years later. It wasn't a concern for them. The movie was supposed to come, thrill people for 90 minutes, go and be forgotten about. It was a utilitarian film in the strictest sense and they did what worked, not what was artistic. There are no hidden depths to this film. The creators did not have those aspirations.

I tend to agree with what kctx85 says, but just for fun, from a fan's perspective, I can get with what you're suggesting. I mean, as written, there wasn't any thought to Jason lurking about in F13, but if we apply any critical thinking (at our own peril) to Part 2, then he must've been around somewhere during the events of the first movie.

Realistically, they just needed a hook for a sequel they never thought they'd have the opportunity to make, so they came up with making Jason the killer in Part 2. But if we're to believe that, then he didn't appear out of thin air. I always figured he was a hallucination at the end of F13, a nightmare vision brought on by Alice's traumatic ordeal. Therefore, the "real" Jason was out there somewhere.

Like I said, just for fun, it's an interesting idea. Good post!

She didn't "throw" Brenda through the window. Just watch the scene. Brenda simply "fell" through as if she was being pushed really hard from the outside. Had she been thrown she would've crash landed several feet across the kitchen floor.

Now, Rick from Part III and Rob from Part IV - those two were definitely picked up and "thrown" threw the window.

This movie is a work of fiction. Nothing was written or suggested in this movie that Jason had anything to do with any of the murders. Your comment is quite silly