When Cahill is chasing the stunt car we see a close-up of oil being sprayed on the ground. In the wide shot the patrol car is swerving as if she is fighting for control but there is no oil on the ground showing that it is just stunt driving.
When the police are following the burglar on motorcycle two short clips have the film reversed: Sindy starts to follow the chase and letters on the building behind her are reversed and after the motorcycle crashes in the alley the clip of the police motorcycle entering the alley is reversed (the same intersection is correctly shown a moment later)
When Sindy jumps out of her cruiser after it crashes, the sound of the siren stops. This makes no sense, as the lights are still flashing, and she didn't have time to turn off the siren.
After he arrests Sindy because he mistakenly believes she is the motorcycle-riding thief's accomplice, the LAPD officer places her in the front seat of his cruiser. Handcuffed suspects are always placed in the backseat, from which they cannot escape. The front seat is dangerous because the suspect can escape or injure the officer. Also, the suspect has access to the dashboard-mounted shotgun.