Starts with a literal bang. A dark, interesting concept that soon devolves into a generic look-book for a director determined to rip off Altered States, Inception, and a pile of other films - hell maybe even Flatliners. Not to mention the nonsensical ending. What is it with writers giving up trying by the second act? Segel and Mara are forced, though she is more likeable than he. Generally, wasted potential.