Was going up ramp & engine stalled out. Lost air to brake system, truck hit berm and tipped over. Bent door, broke seat & battery box restraint. EE was asked if he was ok, said he was fine. No visual injury noted. Asked later if he needed to be checked out. EE said no he might be sore, bump on hand & battery fell on leg. RTW 11/2/07. Fine till noon & complained of back hurting.