The art of motion has always intrigued me. How a body - when it throws its weight from side to side and sits down - actually sits down. What muscles … - Ray Harryhausen

For some reason the creation was called a rhedosaurus, and although I can't remember where this name came from, I suspect Hal Chester or one of the writers coined it. Over the years, people have suggested that the first two letters relate to the initials of a certain animator. I have no comment.

Although Gwangi had been an allosaurus in Obie's version, I decided to make him more of a tyrannosaurus, and so I used elements from both species to make what I suppose could be called a 'tyrannosaurus al'. This combination allowed me a flexibility between aggressiveness and agility. If you like, he was glamourized.

Greek and Roman mythology had never been a favourite subject of mine at school, but as I grew older I began to appreciate the legends and realize that they contained a vivid world of adventure with wonderful heroes, villains and, most importantly, lots of fantastic creatures.