Engine sounds vary throughout the movie and are frequently mismatched with the engine configuration from the vehicle they're meant to portray (e.g. an inline four-cylinder sound on a twin-cylinder bike, and sporadic narrow-angle twin sounds on Blaze's balanced V4 engine).
When Moreau has the tires on his bike shot out and falls off the cliff, he shoots a P90 at the car, with the ejected rounds flying out of the side of the gun. In reality, the rounds eject out of the bottom of the gun, not the side.
The scene during the final car chase when Carrigan is touching the wind shield on Nadya's car to make it decay shouldn't work as glass does not decay, with the exception of certain really old types of glass which deteriorate due to inherent chemical instability.