https://www.wired.com/story/be-glad-the-broom-trick-isnt-real/

The broom challenge is back! This fun little trick returns every few years on social media. It’s supposed to show a gravitational alignment (whatever that is) among the planets that allows a broom to stand up by itself. It's super special and rare. At least that's what I hear from Cal Tech high-energy physicists and NASA engineers (to quote My Cousin Vinny).

In my ranking of social media “challenges,” this one is better than the ice bucket challenge and the cinnamon challenge, but not as good as the invisible box challenge. And by the way, I wrote about it back in 2012. To quote myself, “All of this has happened before, and all of it will happen again.” It’s sort of silly, but hey, it's harmless, and it makes people happy. Go ahead and try it!