Elon Musk promises that Tesla Semi unveiling will 'blow your mind'

Given how often Elon Musk tends to make bold promises that don't exactly live up to the hype, you'd think that the outspoken Tesla CEO would have learned to cut down on the hyperbole by now. Most recently, Tesla's actual production rate on the Model 3 is laughably behind schedule relative to Musk's initial and overly optimistic projections. Regardless, one of the reasons why Musk is such a fascinating, if not controversial, character is precisely because he's prone to making tantalizing statemen...