The idea of sending their Tesla Roadster to Elon Musk's orbit to Mars, apparently a real joke, seemed real!
If you remember, Elon Musk recently told Twitter that he would put his own cherry-colored Tesla Roadster into the first Falcon Heavy rocket to send to Mars's orbit and turn around in the orbit of Mars for millions of years while David Bowie's famous Space Oddity song was playing in the car. Musk, who later wrote on Twitter and implied that it was a joke with his interviews, looks like he's serious about it.