Corrected entry: In the beginning of the film, when the ambulance hits the cow, the front of the ambulance is completely smashed in and it has stop. When the lone survivor is moving and coughing up blood there is music playing from the radio, which is impossible because there is no power in the ambulance to keep the radio on.
FranyMcbay
2nd Sep 2009
Correction: Not necessarily. As long as the battery is providing power to the radio, it can work. Just because the ambulance has stopped does not mean the battery was damaged. The engine can stall, the ecu can be damaged by impact not allowing the vehicle to restart, but the radio is generally on a separate circuit. As long as there is power to the radio, it'll work.
rswarrior