In one of the scenes prior to the end, the side window of the Silver's delivery car (where Sheila is sitting) is assaulted by the gigantic dildo by Mercy. When Silver drives away, the dildo is no longer present.
When Silver's car is running away from him, as he chases it down the street with Sheila, the car's brake lights come on as it mounts the curb. although neither of them are in the car, revealing that someone else is in the driver's seat operating the vehicle.