Bizarre line works dance to casual music. Retrograde are the watch faces of Swiss watch-maker Pierre Kunz. Unlike standard clock hands turning 360 degrees, Retrograde has unique movements that grab watch-lovers' attention. Attempts were made to meet the specific request by reproducing the unique movements as faithfully precise line drawings. Mouse-over the line drawing of the Retrograde and it activates the clock hands acrobatically ad vivum. The watch face in the opening page was captured by a high resolution camera. With the sound of a real clock hand, Retrograde tick-tocks in time with the music.