We're all for trying new workouts, but the chair traverse—a fitness challenge where you sit in a chair, slither between its legs, and return to a seated position, all without touching the ground—is a surefire way to end up with bumps and bruises. The ninja-like move started as a , but now are trying it out. There haven't been reports of serious injuries—yet—but anytime you fall on your head, you .

So if you can't do it as flawlessly as this guy, sit this one out:

Still not convinced? Watch this cringe-worthy attempt:

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