I suppose we would be monsters to a Venusian. [...] We depicted the outer space creature as something strange rather than as a monster. He was from a… - Ray Harryhausen

When it came to the tiger, I found that animating the movements of a large feline animal posed some difficulties, as it required precise and miniscule advancements in movement throughout its body. As well as tigers, I also studied domestic cats, and by so doing managed to achieve a combination of mannerisms represented by both. The overall impression is of latent ferocity and a lust for blood, but at the same time there are also slow, graceful movements that mask the creature's power.

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.

The most popular exhibits in any natural history museum are, without doubt, the dinosaurs. These creatures' popularity grows each year, partly because of the recent resurgence of dinosaur movies, but also because a skeleton of a full-sized tyrannosaurus rex still has the ability, even 65 million years after its death, to chill us to the bone.