The always entertaining Randall Munroe over at his new(ish) What If? blog, answering the question “What would happen if everyone on earth stood as close to each other as they could and jumped, everyone landing on the ground at the same instant?”
This is one of the most popular questions submitted to this blog. It’s been examined before, including by a ScienceBlogs post and a Straight Dope article. They cover the kinematics pretty well. However, they don’t tell the whole story.
Let’s take a closer look.
Twist ending, directed by M. Night Shamalamadingdong.