Elon Musk is known for his outspoken views on a range of subjects, but his candour cost Tesla $2 billion (£1.47 bn) overnight on April 2 and 3, 2018.
That's the total value that was wiped off the electric vehicle company's shares, seemingly in response to the CEO's rude attitude during a quarterly earnings call.
A number of awkward exchanges took place during the teleconference call.
Branding questions boringiPhone transfer software
Part way through the Q&A session, money management firm Bernstein's senior analyst Toni Sacconaghi was involved in a back and forth with Tesla's chief financial officer Deepak Ahuja.
In response to questions about the profitability of the upcoming Tesla 3, Musk said: 'Excuse me. Next. Boring, bonehead questions are not cool. Next?'
Rudeness to analysts
When Joseph Spak, an analyst from RBC Capital Markets posed a question about the Model 3, asked another question, shortly after Mr Sacconaghi, Musk reportedly paused for 15 seconds
He then added: 'These questions are so dry. They're killing me.'
Endless YouTube questions
Musk then gave the floor to Galileo Russell, host of YouTube channnel HyperChange TV, which has around 9,300 subscribers.
Mr Russel asked a series of questions of Musk and other senior Tesla executives, which lasted 20 minutes, with Musk thanking him for the 'great