After reading so many film reviews and my own guesses, I think everyone should have disappeared into a space where only oneself exists. The last heroine blinked to open her eyes, and all the police disappeared. It means that from the perspective of the heroine, she Disappearing into the space where only herself exists, otherwise it doesn't make sense at all.
However, there are many bugs. For example, the blood will disappear when it disappears, but the man who drove just disappeared with the key, but the pistol remained. The distress message written in the door under the cupboard also exists, and the don’t blink on the mirror also exists.
It should be much better if there are no bugs.
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