Unlock the Secret of a Gravity-Defying Parkour Stunt—With Physics!

https://media.wired.com/photos/66ec8a49a821c924c492749e/master/pass/parkour-sci-748336053.jpg

Yes, you really can climb a building by jumping back and forth between two opposing walls. Thank you, Isaac Newton.

https://www.wired.com/story/the-secret-of-a-gravity-defying-parkour-stunt/