Prototype Cheetah Mech: Vanishing Beyond Speed During a high-speed mobility test, engineers inside a moving off-road vehicle monitor the Prototype Cheetah Mech sprinting across the desert. At first, the robot runs in its humanoid configuration, keeping pace with the vehicle. Dust blasts against the windshield as both speeds increase. Moments later, the prototype initiates its transformation sequence: armor plates shift, limbs fold and reconfigure, and its frame lowers into a streamlined quadrupe