"Nuggets reserve forward DerMarr Johnson was charged with resisting arrest and interfering with police during a disturbance outside a nightclub. Police said they used a Taser on him to calm him." Source here.
A Taser fires small dart-like electrodes with attached metal wires that connect to the gun, propelled by small gas charges. A Taser 's burst of voltage is often 50,000 volts.
When I hear or use the word calm, it's usually in the context that conjures up images of a quiet beach, or the stillness of the moments before sunrise. It's NOT the word I'd use to describe what happens here: