Watch the original 1978 version!!!
This 2012 version is not only boring but confusing at times. It was a totally unnecessary re-make.
If you want to see a tight edge-of-your-seat suspensful movie, watch COMA 1978! It stars Genevieve Bujold and a young Michael Douglas, whose tongue, as usual, is FOUL, but it is also in a short scene, and not throughout the movie. Tom Sellick even has a small role, and veteran Richard Widmark plays an important part.