Well going to the person at the counter and ordering a ticket to this film should be fun. Actually the premise of the film sounds pretty cool and it definitely seems that they will use the tight enclosed space of the tunnel to bring a sense of claustrophobia. Actually after reading the synopsis the narrowing of the tunnel can be a symbol for something else as well. The film's release date is still TBD so for now you can check out the trailer below and visit the following sites to keep up with updates and find out more information on the film.
Synopsis: An elite security team assigned the task of protecting the last known woman who can become pregnant, find themselves caught in an endless claustrophobic underground tunnel system. The team soon learns - the real horror is not the unstoppable force chasing them, but the ever growing smaller tunnel itself. The will to live for each member of the team gets challenged with the obstacle of a fourteen inch two thousand foot tunnel.