The contact owns a 2018 Chevrolet Equinox. The contact stated that after parking in the driveway and switching the shifter to the park position the driver exited and moments later the vehicle erroneously rolled backward down the driveway. The driver attempted to get back into the moving vehicle and fell causing the vehicle to roll over the driver's body and crash into a tree. During the incident, the contact experienced an injured hip which required medical treatment. The vehicle was towed to a local body shop for repair. The manufacturer was notified of the incident and a manufacturer's engineer examined the vehicle but no problem was found. The cause of the failure was not determined. The contact was informed that the vehicle was not included in the NHTSA Campaign Number: 17v516000(Power train). The contact indicated that the vehicle had experienced the same failure listed in the recalls. The failure mileage was 42,000.