Being John Malkovich- A puppeteer finds a portal that leads into the mind of a movie star, that movie star being John Malkoivch

Resident Evil- A Special Ops unit must fight off a hoard of scientists who have turned into flesh eating zombie.

In the Eyes of the Dead- A man fighting for survival in a zombie apocalypse, discovers how to get into the mind of a zombie, and the revelations that follow are very interesting.

A man trying to survive in a zombie infected world is trying to find a way to survive and conquer this disease. He finds a secret portal into the mind of the head Zombie and he understands why the zombies are doing what they are doing. When he returns through the portal he is a changed man and tries to learn to deal with what is the inevitable future of man-kind.