The euphoric energy of British quartet Crystal Fighters manifests itself into the form of twelve pro-aerialists swinging from the rafters of a cavernous warehouse space in Ross Cooper’s mesmerizing music video for “Wave.” “The song is about acknowledging something special and precious about the moments we share with each another,” explains hirsute lead singer Sebastian Pringle of the rapturous song that serves as the opener to the band’s second album, Cave Rave. Creating a gracious, undulating visual effect known as a ‘pendulum wave machine,’ Cooper had the athletes’ ankles laced with live pyrotechnics, so that molten ash dripped on to the concrete canvas below. The filmmaker first met Pringle in London during a game of five-a-side football, and pitched him the technique, that was first used by Austrian physicist Ernst Mach in 1867 to illustrate the relationship between space and matter. “I had seen a Pendulum Wave Machine before and was obsessed with the idea,” says the Royal College of Art graduate who has directed hypnotic promos for Bloc Party, Wild Beasts and Two Door Cinema Club. “They create a harmonic oscillation that is both beautiful and fascinating to watch. Crystal Fighters’ wave machine is the biggest ever created.”