On 12/9/23 i had just put my 4 year old granddaughter in her car seat, in the rear of my 2017 Chevy Equinox. I walked around the front and opened the driver's door. I got one leg in and felt the car move. The car dragged me as it rolled backwards out my driveway. I was able to turned the steering wheel enough to keep from crashing into the house across the street. The front tire ran over my right ankle. The driver's door hit the fence post bending off the hinge. The neighbor jumped in and pulled emergency brakes. Luckily my grand was okay and I only suffered minor injuries. We don't understand why this happened with the vehicle off.