Movement in Lighting: Concert

I took this short video at a Young the Giant concert a few semesters ago. The lead singer had intense warm orange spotlights shining on either side of him, alternating quickly to the beat of the drums. I remember the effect of this blowing my mind. The singer looked as if he were rapidly shifting left and right. It was pretty trippy. The sudden disappearances of these spotlights and appearance of the strobing lavender lights behind him was an aesthetically pleasing surprise, and somewhat made it look like the singer had disappeared.