Time flies when you're floating aimlessly through the cold, inhospitable wasteland that is space. And it's already been seven years since SpaceX test-launched its powerful Falcon Heavy rocket, shooting founder Elon Musk's personal Tesla Roadster into space.

Furious protesters gathered outside a Tesla store in Boston on Saturday calling for the arrest of billionaire owner Elon Musk and impeachment of US President Donald Trump.

Musk, who also runs SpaceX and a number of other companies, has been known to make big often exaggerated promises. For example, he once called the Hyperloop, which was never built, the "fifth mode of transport" and famously promised to take Tesla private in a Twitter post, saying he had secured financing that he didn't have.