Tron-like grid patterns; hypnotic cones that throbbed in phase with the audio; laser-gun beams firing salvoes at the back wall: each new mode was so tightly choreographed to Fox's abrasive sonics that the combination of sound and visual seemed to tickle some third, underworked part of the brain... After 30-odd minutes, the lasers flicked into a particularly mind-blowing mode—a trio of spinning discs which left a crosshatched mist in the air—and then, PFUTT!, they were gone, and we all picked our jaws up off the floor.