I don't have strong opinions on Musk, but there's a scene from Werner Herzog's documentary Lo and Behold where, after interviewing people who advocate working on Earth before trying to go to Mars, he cuts to Musk saying: "I don't remember my dreams, I only remember my nightmares" followed by a long awkward silence where Musk looks away uncomfortably. Clearly a result of some creative editing intended to make a point, but (and maybe because of that) I remember finding this very funny.