The Invisible (2007)

Nick is a high school senior with a bright future until, in a tragic case of mistaken identity, he is brutally attacked by a troubled girl, Annie, and his body is left for dead. Now in limbo, not quite dead but invisible to the living, his spirit can only watch as his mother and the police search frantically for him, unaware that he is only hours away from truly perishing.

Official website: http://www.myspace.com/theinvisiblemovie