Josh Kaplan was driving his car on the 405 freeway in Los Angeles when he saw a vehicle behind him stop.

He told Insider that he saw a car facing left against the barrier.

The vehicle had smoke coming from it, and he realized it was aTesla. It caught fire when I called. It looked like sparklers were going off.

The driver of the crashed car was not hurt. The driver told Kaplan that the Model X stopped against the wall because it was in autopilot.

A picture showing medics talking with the driver of the Tesla that crashed.
The driver of the crashed Tesla was examined by medics.
Josh Kaplan

The fit and finish of Kaplan's car has been a complete disappointment, despite the software.

He said that his Model X has made many frightening miscalculations.

He said that last week it ignored a traffic cone and ran over it. The car turned from the inside of a double-turn lane into the outside lane even though other cars were already in that space.

Kaplan said that the user interface would often display a blank screen when the software crashes or the system doesn't update that some basic functions are turned off.

If the computer crashes while you're driving, you don't have a way to know what your car is doing.

Kaplan said that autopilot should be advertised as the scariest ride.

According to a report released earlier this year by the US road-safety regulators, vehicles using autopilot were involved in over 250 crashes over the last year.

The company didn't reply to a request for comment.

Did your car get involved in an autopilot accident? This reporter can be contacted at stabahriti@insider.