2002 GMC ENVOY User Comment / Complaint

My envoy was put into park when i went to lock the front door. when i got out of the car and took two steps, it slipped out of gear and went rolling down (very slight grade) the driveway in reverse. i jumped in to try and stop it before hitting neighbors cars. i grabbed the steering wheel to pull myself in, which made the envoy turn to miss on car, then it threw me out, almost running over both of my legs with the front wheel. it then proceeded to hit a satellite dish, and air conditioning unit (which all but ripped the door off the hinges.) it then finally stopped after running through a fence and it rested with one wheel in the air on a mound of dirt.