A high speed piston that can be seen in 175cm long body

Dynamic riding special with 175 cm long body. The man was overwhelmed by the foot coke while looking down at an acute angle. It is a spider riding position where the cover is covered like a spider's nest and does not escape the prey, and the high stroke pillow piston that swings down the waist so that it is rubbed from the root to the head of the head is a high speed grind. Can you endure the waist shaking that doesn't stop even if it is inexhaustible stamina?