Man’s gross prank goes horribly wrong after his pants catch on fire

He suffered from a serious case of fart-burn. A Chinese man's attempt to light his fart literally backfired after he accidentally set his pants ablaze, as seen in viral footage igniting the internet. A video obtained by South West News Service shows Bin Touzi of Jilin province lying on his bed as he prepares to, well, add fuel to the fire. Heeding Bin's instruction, a friend and idiocy enabler — who unsurprisingly wished to remain anonymous — raises a lighter to his buddy's bum. He ignites it right as the prankster lets 'er rip, creating a massive fireball that sets…