Musk's social media antics were part of an April Fool's prank, but investors weren't laughing. Tesla shares dropped another 5 percent, according to The Washington Post, with business experts openly questioning Musk's ability to lead the multi-billion dollar company.

Every year, journalist Ben Black publishes a playful fake story on his community news site Cwmbran Life for April Fools' Day. Since 2018 the 48-year-old has created a number tales, from a Hollywood-style sign on a mountain to a nudist cold-water swimming club at a local lake.