better movie: Jacob's Ladder (spoilers)
I agree with the theory presented by mwbubelah presented here... that the entire story is all in the mind on the deathbed, taking place in 2 minute period.
This is extremely similar to the much better movie http://www.imdb.com/title/tt0099871/ Jacob's Ladder. Jacob's ladder has similar theme with inappropriate doctors (chiropractor vs. pediatrics), waking up with different wifes, etc.
On the IMDB BBS for Jacob's Ladder, someone mentioned that the movie commentary references a short story called "An Occurrence at Owl Creek Bridge" written by Ambrose Bierce in 1891: http://eserver.org/fiction/occurrence-at-owl-creek.html
The 10 word description that Comcast Cable displayed with Starz emphasized the Time Travel aspect of The I Inside, I think that was a big mistake. At least they showed it on their mystery channel :)