Ray Harryhausen is considered to be one of the greatest Stop-Motion Animator ever!
Ray animated characters in clay, and they were placed in movies to create the illusion they were real.
It took Ray Harryhausen 4 and 1/2 months to animate the skeleton fight scene for Jason and the Argonauts.
Click the photograph above to link to the fight scene.
Ray had an opportunity to work with his favorite animator, Willis O'Brien, the animator of Kink Kong (1933).