Elon Musk is known for his outspoken views on a range of subjects, but his candour cost Tesla $1.8 billion (£1.3 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