Jack Sweeney, who's facing legal threats from Elon Musk for tracking his private jet on Twitter, said he believes Musk is bluffing. "I'm doing fine. He's just saying that...There's nothing official and there probably won't be," the 20-year-old said. Musk threatened legal action against people, including Sweeney, for "supporting harm" to his family after a stalker followed his two-year-old son.