Published Nov 15, 2026 7:54 AM EST On any ordinary day, you might witness the breathtaking display of squirrels high in the trees, doing what seems like effortless, daredevilish parkour. They might launch themselves off one branch, bounce off another, and somehow reorient themselves in midair like it’s nothing. A large, heavy human being attempting these same maneuvers would likely fall—and would be looking at a trip to the E.R., at best.