#i swear i tried my best:D

[sollody]

What if Will's upside down related flashbacks were 'normal' flashbacks at first, but eventually got turned into some kind of reality!? (-> a semi-physical manifestation of his memories of his time in the Upside Down that ended up being some sort of intangible bridge between the two dimensions which could only be crossed by psychic beings.)

Does that make sense? (I'm really bad at explaining things in general and I really struggled to put the thought into words ... so it probably doesn't, but that's fine. :D)

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It's just a loose idea that popped into my head when I was trying to find an explanation for why it took Henry/the Mindflayer almost a year to properly interact with Will, even though he'd been experiencing those episodes for quite some time.

Plus, it would kind of fit with the creation/manifestation power theme.