Every year at the Blue Angel Airshow here at NAF El Centro, the Wall of Fire is produced. A simulated air fight between a Bearcat and Japanese Zero aircraft ensues. They climax with a simulated bomb drop from both aircraft. Here, the largest explosion occurs. Since the bomb drop is simulated, catching the explosion in its infancy is critical. It's where the rawest form of the fire exists. Using the planes and the people in the foreground for scale, you can see how large this explosion is.