I dont remember everyone who was shot, be it stunned or disintegrated. (seems those are the only two settings effectively) I remember Kruge's gunner and Terrel screaming, they seemed to be having horrible death even if the pain was short. In TOS people simply vanished. The bum in 1930 (City at the Edge of Forever) probably never knew he was dying. ANd stunned people? do they simply pass out?