– The latest unfortunate headline for Tesla comes courtesy of actress Mary McCormack, who on Friday tweeted a video of a Model S with flames shooting from it. "This is what happened to my husband and his car today. No accident,out of the blue, in traffic on Santa Monica Blvd. Thank you to the kind couple who flagged him down and told him to pull over. And thank god my three little girls weren’t in the car with him," wrote McCormack, who has had leading roles in series including Murder One and The West Wing. Tesla says it is investigating, calling such an incident is "extraordinarily unusual," CBS News reports. Responding to queries on Twitter, McCormack said the Tesla wasn't equipped with Autopilot and that her husband was "barely moving in traffic" at the time. "Our initial investigation shows that the cabin of the vehicle was totally unaffected by the fire due to our battery architecture, which is designed to protect the cabin in the very rare event that a battery fire occurs," Tesla says in a statement. It is not officially blaming a faulty battery for the fire, but local authorities say that could be the case. The editor-in-chief of car site Edmunds notes, "We've driven over 50,000 miles in these vehicles and have never replicated this or anything like it, nor have we seen any evidence elsewhere of other cars spontaneously catching fire, so I think it needs more investigation." The Street notes that Tesla's stock slumped in pre-market trading Monday.