The act of eating a large amount of beans, broccoli's, onions, or what ever it is that gets you the most gassy. Next step, take a light jog to get it all mixed up. Now assume the 69 position, once you start chowing down and the urge to fart hits you your partner is required to light that jurnt on fire. If a fart happens to hit both of you at the same time and they are both set a flame this is considered to be a higher achievement.
Co-employee: Dude, why are you missing half of your beard, an eyebrow, and a small patch of hair?!!?
Employee: Duh, I pulled of the 69 Flamethrower last night... It was an inferno!