Step-Sister Mandy Flatulence, The Farting Nun, Teaches a class on farting and intestinal disorder to Kelly and Rob. Stinky smelly farts shoot from her bottom as she expains where and why farts grow! Kelly begs to leave after Step-Sister Mandy gives her an up close example of their lesson. Then it's Robs turn as Step-Sister Mandy lays a juicey stinky fart right into his face!