http://msn.foxsports.com/nascar/stor...0?FSO1&ATT=HMA
apparently a deer made it's way onto the track during a test session and DaMatta hit it.
He was unconscious when he was airlifted out and it was revealed he had a subderal hematoma (ruptured blood vessel in the brain IIRC). He is in ICU under observation right now. Justin Wilson, his teammate, will not race in the ChampCar race this weekend.