Mr Methane is the stage name of Paul Oldfield, a British entertainer who built a stage and television act around performing well known melodies through controlled flatulence. The Blue Danube was written by Austrian composer Johann Strauss II in 1866 and became one of the most famous waltzes in the world, associated with ballrooms, New Year concerts and elegant dance scenes. Pairing that tune with Mr Methane's act turned it into a long running novelty favourite online, shared wherever a refined classic can be undercut by a perfectly timed rude performance.