Action Lab Just Pulled Off Their Most INSANE Stunt Involving A Truck Moving At 50MPH And A Dude In A Catapult

If you’ve ever watched a physics class and thought, “Okay, but does this work in real life,” the internet has your answer and it involves a stuntman, a truck going highway speeds, and a perfectly timed catapult.

A viral post is making the rounds thanks to a 19-second video that shows a stunt performer in a bright red jacket being launched backward off a flatbed truck traveling about 80 km per hour, roughly 50 miles per hour. Instead of flying down the road, the stuntman drops straight down and lands upright on the pavement with almost zero forward motion. It looks fake. It is not.

The clip is a real-world demonstration of relative motion, specifically Galilean relativity and Newton’s laws, and it is wildly satisfying to watch. Because the stuntman is launched backward at nearly the exact same speed the truck is moving forward, the two motions cancel each other out. The result is a drop that looks almost vertical, as if the road itself suddenly appeared underneath him.

The original explanation comes from a February 6, 2026 video by The Action Lab, which breaks down why the stunt works and why it is much harder than it looks. The timing has to be nearly perfect, the launch speed has to match the truck’s velocity, and the human body has limits when it comes to sudden acceleration in the opposite direction.