Elon Musk said the black eye he was sporting in his Oval Office goodbye May 30 came from "horsing around" with his 5-year-old son, X. "I said, 'Go ahead, punch me in the face.' And he did it," Musk said.

Elon Musk attributed his bruised appearance at a White House news conference to his son. “I said, ‘Go ahead, punch me in the face.’ And he did.”

After 130 days spent fighting the federal government, Elon Musk turned up with a black eye at the White House on Friday for his last day as a “special government employee.” If you squinted, you could see it: His right eye socket was puffy and empurpled. No doubt about it, that was a big, fat shiner.