The story focuses on a man (Christensen) who suffers "Anesthetic Awareness" (An occurrence where during surgery where not enough anesthetic medication for the patient's body weight), and finds himself awake and aware, but paralyzed, during heart surgery. His wife (Alba) must wrestle with her own demons as a drama unfolds around them.

I really liked this movie because it wasn't predictable. As soon as I thought I knew what was going on, I found out that I really didn't.

Absolute nonsense......Man discovers, (whilst he is having a heart transplant!!!), that he is going to be murdered. One of the silliest movies I've seen for a while. Anyone with even a sprinkling of medical knowledge will laugh out loud at the ridiculous situations seen in the movie.
Having said that....I did stick with it to the end.....more out of curiosity than anything.....although Jessica Alba made the task a little easier