As a man who studies about things like this, and is a Christian, it is a very fun movie if seen through a more spiritual lens.. Portals and movies like it always have the SAME end: You tamper with things you have no business tampering with, and you will see HELL!! LOL! Yes, the different scenes had 2 things in common: deception, and possession. Hmm, where have we seen those 2 things play out before? There were subjects like:Quantum computing, black holes, aliens, so called, and well, lots of DEATH,dying and being trapped in a deceptive nether realm.. Oh yeah! my kind of movie.. Actors where ok, I liked that they did film in at least UK and USA for that added realism. The gunman shooting at the portal was by far the only real comedy in this flick.. Like Chief Wiggim shooting his gun into the 3rd dimension on the Simpsons.. priceless. Not a waste of time if you come into the movie with a mindset to enjoy it.
The story line did tie in all parts. The same scientists that talked about what the project they were working on at the beginning did ,did play out in the ending of the movie to its...well..bloody end, with those same scientists. The 3 middle stories were there to show what the effects before,during and after the science experiment gone wrong, did to average people.. Think CERN LHC, DWAVE quantum computer, and the possible ramifications of tampering with black holes,other dimensions and what intelligences wait in the "otherside". Again.. a good movie for the right sci fi(wait, cern and dwave is sci-fact) lover!