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Calculating somersaults and physics

I'm considering the claim about performing 4.5 somersaults in less than 1.5 seconds. That works out to around 3.15 somersaults per second, which seems plausible since typical roller coasters roll at a slower rate. I could respond with an affirmation and a brief physics explanation. Given the ambiguity, I might also ask if the user wants a translation or a catchy headline. I just need to keep my response clear and concise!