Tom: Hey, man, did you know that if you hold up a match by your ass and fart, it'll make a huge fireball, with green smoke!
Dick: Nah, dude. That's fartlore. Besides, only 20% of people even have methane in their farts, which is the gas that makes it possible for farts to be flammable in the first place, silly! Now go make me a sandwich.
Not quite a shitload but still a whole lot. Significant due to the extreme number of fart molecules in on flatus; but not as substantiative as a shitload as farts are gaseous and shit is solid (usually)