u/Silver_Willow1665

Has anyone else seen this movie? I first watched it a couple of years ago and just accidentally stumbled across it again on Amazon Prime. If you've seen it, I’d love to know your thoughts!

I think there's a connection to the backrooms and your mental state.
First, let's start with the scene where Clark goes to the office to meet Mary. He tells her about the Backrooms and mentions he has been inside "MANY" times. We already know Clark is going through a rough patch in his relationship and is holding onto a lot of internal toxic rage and bitterness. When Mary asks if he's ever seen or spoken to anyone in there, he says no, though he occasionally hears movement. But the key is that he's completely sate.
Fast forward to when Clark invites Kat and Bobby into the Backrooms, which is the first time we actually see a murder take place. The way I interpreted this is that Kat and Bobby brought a totally foreign frequency of vulnerability and fear into the space.
Their mental states couldn't coexist with the Backrooms, so the environment saw them as a threat and eliminated them. Clark, on the other hand, was never hurt because his internal rage
captive in the Backrooms. Clark only gets hurt after he finally agrees with Mary that he doesn't need to change. The second he accepts that stagnation, there's a shift in his mental state.
It's almost like a body fighting off a foreign virus. As long as Clark's rage matched the room, he belonged there and was safe.
But the second his mental state shifted, his frequency changed, and the room saw him as a foreign threat and eliminated him.
Let me know what you all think.
I also want to look at the scene prior to Mary entering the Backrooms, where she receives the voice message from Clark saying, 'I opened the window.' This made me think that Mary has suppressed memories of the Backrooms and may have actually entered them as a child. In her childhood flashback scene, her mother explicitly tells her not to open the window. It made me wonder if Mary and her mother were trapped in the Backrooms in the past, and her mother's paranoia was a desperate attempt to keep her from looking or going outside