" Marketing people who made grammatical mistakes in e-mails were let go, as were other people who hadn’t done anything “awesome” in recent memory. “He can be incredibly intimidating at times but doesn’t have a real sense for just how imposing he can be,” said one former Tesla executive. “We’d have these meetings and take bets on who was going to get bloodied and bruised. If you told him that you made a particular choice because ‘it was the standard way things had always been done,’ he’d kick you out of a meeting fast. He’d say, ‘I never want to hear that phrase again. What we have to do is fucking hard and half-assing things won’t be tolerated.’ He just destroys you and, if you survive, he determines if he can trust you. He has to understand that you’re as crazy as he is.” This ethos filtered through the entire company, and everyone quickly understood that Musk meant business. "
― Ashlee Vance , Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future