Gonzalez, full of beer and anger, his sense of machismo deeply wounded, spilled gasoline onto the floor and steps of the hallway. Several patrons who were at the top of the steps saw him in the shadows below, but thought nothing of it. When he finished dumping the gas, he stepped back. Gonzalez lit two matches and threw them onto the floor. Immediately, the gas ignited.
Volatility is highest when gasoline is first exposed to air.
Even just a small amount will burst into what seems like an explosion if conditions are right. Gonzalez walked across the street and watched. He and his friends saw the flames fully engulf the entranceway. They thought they had no way out. But Lydia led them to a little used door on the north side of the club.