It’s time for the main event. From my perch in the back row of section 307, the mixed martial artists inside the caged octagon have resembled ants in combat on the floor of the Sphere. Yet I’m in sensory overload, taking in a one-night-only spectacle as a splash of beer drizzles down my chin and spilled popcorn crunches underneath my shoe. The lights go dark. The Sphere’s mountain-like video wall comes to life and a lone figure is seen flying through a tunnel, over a countryside, and in between skyscrapers. Then-the Sphere taps into its greatest superpower: the illusion of movement. The audience feels the sensation of jumping off a tower, through a cloud of colorful smoke, and through a series of ultra-high-definition images before two warriors walk to the cage, music booming through the venue in clarity as sharp as the visuals. The background becomes a futuristic cityscape with digital drones buzzing overhead.