In his first public appearance after a controversial hostile takeover of social media giant Twitter, Tesla and SpaceX chief Elon Musk on Monday walked the red carpet in a black tuxedo at the annual Met Gala in New York with his mother as his date. The billionaire tech tycoon revealed his plans for Twitter and admitted that he's not completely immune to some of the negative comments said about him by his detractors both in the media and on the internet.