The annoying part
for me was when the two guys and the girl all go back into the mine together looking for the one that broke loose.
Logic would say that if there is some kind of incoherence happening with reality and an apparent loop, which they all ready figured out ... why have the exact same cast of characters go back in. Why not break the loop?
That and I thought it was over reacting and stupid to lock their friend up in a dangerous mine at night. Couldn't blame him for wanting to kill his supposed friends.
This is not a writer's thing ... this my logic thing on the characters.
It's like that commercial for I don't remember what ... but it shows a supposed horror flick and then says that people don't the best decisions in a horror flick.
Yeah, it could had been written better ... but it was a fun ride anyway.