In the 40th minute when Erik is shot in the Mercedes and the car flips over, there is no one in the driver seat.
A gun cartridge, expelled from a gun after being fired 20-30 seconds earlier, would not be smoking.
In the beginning of the movie, there is a Mercedes which has crashed into a tree. There is no reason that the hood ornament should be bent.
As the four in the red Mazda are being chased by the shooter in the white Toyota ute, through the back of the Mazda's rear windshield there is no one pursuing them, and in the external shots one sees no pursing vehicle.