  We present here an inertial active spinning swarm consisting of mixtures of
opposite handedness torque driven spinners floating on an air bed with low
damping. Depending on the relative spin sign, spinners can act as their own
anti-particles and annihilate their spins. Rotational energy can become highly
focused, with minority fraction spinners pumped to very high levels of spin
angular momentum. Spinner handedness also matters at high spinner densities but
not low densities: oscillations in the mixing spatial entropy of spinners over
time emerge if there is a net spin imbalance from collective rotations.
Geometrically confined spinners can lock themselves into frustrated spin
states.
