Update: According to an official statement provided to Electrek, Tesla's vehicle logs "confirm that this Model X was operating correctly under manual control and was never in Autopilot or cruise control at the time of the incident or in the minutes before. Data shows that the vehicle was traveling at 6 mph when the accelerator pedal was abruptly increased to 100%. Consistent with the driver's actions, the vehicle applied torque and accelerated as instructed."

A Tesla Model X P90D owner in California says his car accelerated hard while he was parking, eventually crashing into a building. While this isn't an example of Autopilot gone awry, it does harken back to the early 2000's commotion over unintended acceleration in Toyota cars.

While we don't yet know what exactly happened, we do have the testimony of Puzant Ozbag, owner of that Model X, through the Tesla Motors forums:

Our 5 day old Tesla X today while entering a parking stall suddenly and unexpectedly accelerated at high speed on its own climbing over 39 feet of planters and crashing into a building.

The airbags deployed and my wife's arms have burn marks as a consequence.

This could have easily been a fatal accident if the car's wheels were not turned slightly to the left. If they were straight, it would have gone over the planters and crashed into the store in front of the parking stall and injured or killed the patrons

The acceleration was uncontrollable, seemed maximum and the car only stopped because it hit the building and caused massive damage to the building.

This is a major problem and Tesla should stop deliveries and investigate the cause of this serious accident.

Tesla roadside assistance, who was my only contact, asked us to tow the car to AAA storage facility.

First and foremost, we are thankful that nobody was seriously injured. As Ozbag noted, the Model X hit the side of the building, missing the glass doors into the shops — though the sheer inertia of the Model X did deal heavy damage to the corner of the building it did strike.

And while Tesla will no doubt produce for the Ozbag family and their insurance the data logs from the vehicle, we highly doubt that the Model X actually accelerated on its own. We really don't want to point fingers here, but in all likelihood this is a case of driver error — instead of pressing the brake pedal while pulling into the lot the driver depressed the accelerator. And driving a Model X P90D with a 0-60 time of 3.8 seconds, that 39 feet of planters would have been crossed in no time at all.

Blame for Toyota's problems with unintended acceleration ended up being pinned on poorly-designed floor mats that could wedge the accelerator to the floor, though NHTSA data indicated that Toyotas were not significantly more susceptible to unintended and uncontrollable acceleration than other vehicles. Whether something similar happened with this Tesla, only time will tell.