Got it ! And yes, it certainly did feel that way ! I've never tried this but my younger brother did this one day when he was about 14-15, and hasn't done it since ! My mother
and I were playing cribbage at the kitchen table one rainy Saturday afternoon when he steps out of the bathroom in his skivvies and wrapped in a towel ! He sits in the chair next to my mother, takes the towel off and lifts his legs into a 'frog' position; takes her lighter off the table, holds it next to his 'back door', lights the lighter and 'rips' one out ! A 2-ft. green flame (nitrous sulfide exhaust) blasts out of his butt, but not satisfied with the result, he tries it AGAIN !
Second time, he ran out of pressure prematurely; the flame burned a small hole in his skivvies and he was dragging his butt around on the floor like a dog out on the lawn ! My mother and I laughed so hard we had tears in our eyes for the next fifteen minutes ! Never saw him ever try it again !