Clash was destined to be my last hero picture, and looking back, the decision to end my career at that point was absolutely right. With all the problems involved in production, and the knowledge that I was losing precious control of solo animation, I was forced to concede that it was time to stand aside for others and their new technology to take over.

Ray Harryhausen & Tony Dalton (2003), An Animated Life, Aurum Press, pp. 280-2