Tesla (TSLA) shares are going up in smoke on Friday as the company's executive talent exodus hit a new gear. 

The electric auto maker saw its stock tank about 10% on Friday to $259, breaking below the key 200-day moving average for the first time since Nov. 2017. 

Shareholders voiced their concern on an appearance from CEO Elon Musk on the Joe Rogan podcast, in which he smoked marijuana, drank whiskey and told the comedian during the two and a half hour interview that it was "very difficult to keep a car company alive."

"I'm not a regular smoker of weed," Musk said. "I don't actually notice any effect. I don't find that it is very good for productivity."

Meanwhile, Friday saw the departure of Tesla's chief accounting officer, Dave Morton, less than a month into the job.

"Since I joined Tesla on August 6th, the level of public attention placed on the company, as well as the pace within the company, have exceeded my expectations," Morton said in a statement. "As a result, this caused me to reconsider my future."

Tesla said the company's accounting functions will be overseen by chief financial officer Deepak Ahuja and the group's corporate controller, according to a filing with the U.S. Securities and Exchange Commission.

"I want to be clear that I believe strongly in Tesla, its mission, and its future prospects, and I have no disagreements with Tesla's leadership or its financial reporting," Morton added.
 
Tesla's HR chief also reportedly departed on Friday. A Tesla spokesperson didn't return a request for confirmation of the the exit.

Martin Baccardax contributed to this story.

More on Tesla's future from TheStreet here

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