Rebecca Cook / Reuters Tesla CEO Elon Musk conducted a deeply strange earnings conference call with analysts after the company reported Q1 earnings. At one point, Musk cut off an analyst and turned the call over to a YouTuber. Musk labeled questions about Tesla's business issues "boring" and dry." Tesla's stock plunged in after-hours trading. I've listened a lot of earnings calls with automakers and more than my fair share of Tesla calls, presided over by CEO Elon Musk with a mixture of cheerleading and contempt.