While exiting a hospital parking deck, after driving for approximately 15 to 20 seconds, the car began to accelerate to an uncontrollable rate of speed on its own. The Tesla crashed into a parked car which was then pushed into two other parked cars. The Tesla and at least the first car hit are totaled. There was no sign of the emergency braking system engaging. Injuries from the airbag deploying were sustained. The driver has a fear to drive again as the car seemed to have a mind of it's own. The Tesla is being held at the insurance company's tow yard. There has been no feedback from the dealer. No inspections have been conducted on the car. There were no indications there was a problem with the vehicle previous to the crash. It is unknown if any warning alert systems activated during the incident.