SkippyGoofs
Factual errors
Skippy's trademark 'tchk tchk tchk' noise was entirely fictional. Kangaroos make no such sounds. It was produced by someone clicking their tongue.
Crew or equipment visible
More often than not, if Skippy is standing around or appearing from behind bushes, a stage-hand's arm or hand is clearly visible pushing Skippy into doing what's required for the scene.