Former Ranger Explains & Teaches The Ranger Roll
You never know when you'll need to move a body, might as well take technique with you. Wil Willis is a retired US Army Ranger, and US Air Force Pararescueman. If he looks familiar, he's also the host for History Channel's Forged In Fire blacksmith competition series, though there's a chance you know Wil from his work on Special Ops Mission when it used to be on Discovery.
Armed with some light science, the laws of gravity and inertia, you might be able to pull something like this off with enough practice. Obviously, it looks like it does not feel good at all to be the 'dummy' in this scenario, but what else can you work this out with? A sack of potatoes just won't cut it.