Arnie Heitz
I just saw a rough cut of the film, and I would be lieing if I said I remember anyone's performance over the one delivered by newcomer Arnie Heitz.
During the scene where he walks thru the hospital doors, his presence stands like a wall of raw emotion, blocking those doors for all actors not keen enough to hold their own against his talent long enough to pass thru them.
In film, there are few scenes that stand out in my mind as truly great. Marlon Brando hunched over Stella's broken body in Streetcar. The snowglobe shattering with Kane's death. Scarface falling, dead and bloody into his own fountain. And Arnie Heitz bursting thru those cold hospital doors.