When a tree falls but nobody sees it, does it make a noise? The answer to this film is only clear once the real situation is hinted at. Pay attention because this film wants you to think long and hard about the possibilities. The exciting thing is how it makes you theorise and try to work out a logical explanation based on the situation at the time... I've loved reading all the theories. I found a lot of the poor reviews on here are largely critics of a non-substantial answer, and unclear ending. On that basis this film appears poor. I agree. And is why i scored this 8 instead of 9. However, I love what I call "low budget no budget" filming, where the viewer is forced to watch again to make sense for the "aaaahhhh" moment. This film is not quite at that calibre, but nonetheless has spawned some interesting theories.
Spoilers...
To understand this premise, one needs to be open to the acceptance of our physical world being more than what we can see. Unfortunately there is a huge omittance throughout the film, one could argue this is both beneficial and annoying at the same time. Think Schrodinger. Is all I'm going to say on that. It was my opinion the storyline was about more than aliens or evil. What struck me throughout was the fact they did blink. And people didn't go away. So, why? What was the catalyst?
Doctor who episode "BLINK" is likely a big influence for this film. It shares an obvious plot but also a less obvious one.
I went searching for answers and was pleasantly greeted with one YouTube entry from a guy who supposedly contacted the director, Travis Oates, for answers. He was not disappointed. I say supposedly because I haven't yet checked out the breadcrumb trail but this most closely supported my existing theory. Kidding. I had no clue which is why I looked it up. But I did agree with the final scenes theory; it was (supposedly) exactly what I thought. Nobody in her immediate surroundings disappeared; the big clue was the radio. In fact that was the biggest clue; because why would someone 100miles away disappear? Answer: they didn't. The final victim did. She was catapulted out of one dimension into the next.
Big spoiler...
I need to watch again to look for clues of the reported "experiment gone wrong" which slowly loaded visitors to the area with enough matter to render them universally irrelevant... matter which is observed is present but when it isn't observed, no longer exists. Doesn't really explain the reappearance of the first guy who disappeared, knocking at the door. The fact the young girl knew when it was her time was intriguing, demonstrating that we are all atoms and some are more in tune with theirs, is a real thing.
The one thing I feel this film lacked; even at the end is that it wasn't explored enough. Which is why I need to follow that breadcrumb trail to see if that was in fact the reason, or if the film truly was just open ended. Clever. Trust no-one LOL.
Recommendation
Another great example of this genre of filmmaking is "Coherence". You will need to watch that one more than once, and also watch the 'making of' footage afterwards (not before) to feel the film. It's GENIUS! I felt "Don't Blink"could have been similar had there been some more clues...