In this shot, there’s a very large, powerful flash coming from above and camera-left. Most stadiums in America have a Speedotron system up in the rafters. They can produce 9600 watts in a single pop, per flash head. Overcoming the stadium light is easy when you have a dozen or-so Speedotrons in the arena. They also have a flash duration as fast as 1/5000 second at full power, talk about stop-motion!