Video appears to show Tesla driver asleep at the wheel on Interstate 5 in Southern California

SANTA CLARITA, Calif. -- This is not what you want to see while driving on a Los Angeles County freeway. People in a passing car got video of a driver seemingly sleeping behind the wheel of a Tesla on I-5 near Santa Clarita on Saturday, Aug. 17.

"He was completely out - sound asleep," said Clint Olivier, the driver who saw the Tesla. "My wife was on her phone on Instagram or something and I said get off your phone and record this!"

Olivier said he did not contact police because the driver woke up and regained control of the car. Olivier said the Tesla was not moving erratically and was traveling 70-75 mph.

It is not clear if the vehicle was in autopilot mode.

Tesla's website advises drivers that "Autopilot is intended for use with a fully attentive driver, who has their hands on the wheel and is prepared to take over at any time." Tesla says Autopilot is not the same as self-driving.