Truly Ultimate Power (a Study of Energy Transfer)
Note the 6th frame, the frame right before the release of the energy/rock. It is the only frame that the ninja appears tense in. Every other frame is either the fluid motions leading into the release or the continued fluid motions of the spin after the release. It is in a single split second that all the pent up energy from the spin is dominated by the ninja and then let loose.
A larger image of the ninja exposing his truly ultimate power.