Elon Musk got a lot off his chest in a tearful interview with the New York Times, but Tesla investors apparently weren't feeling very sympathetic on Friday. The stock fell 8% in the wake of the interview in which he detailed "the most difficult and painful year" of his career, from both a professional and personal perspective, reports CNNMoney. The stock also is down about 13% for the week, the worst weekly performance in a year, notes MarketWatch. Much of the trouble stems from Musk's startling tweet about possibly taking Tesla private, but this whistleblower hasn't helped. (More Elon Musk stories.)