The Double-Bass? For Weaklings. Check Out The Octobass

It’s almost 12 feet tall, weighs 289 pounds, sounds four octaves lower than a double-bass, and the player has to use levers for fingering because there’s just no hope of reaching the fingerboard. The octobass was invented in 1849, and the Montreal Symphony is now the first orchestra in the world to have one. (includes video)