Bizarre video shows a man playing tricky and fast riffs on a mobile rhythm game using only - his tongue.<br /><br />Rhythm Master is a music-based mobile game that challenges players' timing and reflexes by having them tap, slide or hold various notes in sync with songs. <br /><br />But instead of using his fingers, the man, from Jiangsu, China, was able to keep up with the music by quickly flicking his tongue on the mobile screen.
