The introductory video of 'Shaggy' whirling hisconker was created with a program that includes a simulation engine forNewtonian mechanics. We used this engine to animate the conker and its string - so the resulting motion is in a sense 'real'. Shaggy's hand drives the motion of the conker and this was defined using trig functions applied to the various joints that make up the Shaggy model. In the final 5 seconds the frequency of the hand motion is exactly half that which sets the conker whirling initially, but itsamplitude is unchanged.