Prehistoric Beast is a ten-minute-long experimental animated feature film conceived, supervised and directed by Phil Tippett in 1984. This sequence is the first film produced by the Tippett Studio, founded by Tippett. Made with the go motion animation technique, scenes from "Prehistoric Beast" were included in the 1985 full-length documentary "Dinosaur!", first aired on CBS in the United States on November 5, 1985. On April 2011, the Tippett Studio had published on its YouTube official channel a digital restoration of the short.
Synopsis.
Set 65 million years ago in what is now the Canadian province of Alberta, this short film depicts the chase and predation of a "Monoclonius" (sometimes synonymous with "Centrosaurus") by a "Tyrannosaurus rex" (or a closely related genus like "Albertosaurus"/"Gorgosaurus" or "Daspletosaurus"). 
The short opens with a tracking shot in the middle of a forest at night. The "Tyrannosaurus rex" is busy eating and finishing an "Edmontosaurus" carcass. The next morning, a herd (and family) of "Monoclonius"/"Centrosaurus" is seen grazing. One member wanders into the forest to find more food. It finds a field of flowers and begins grazing. It wanders in further and starts to be hunted by the same "Tyrannosaurus rex". 
The "Tyrannosaurus rex" steps on a twig, which makes the "Monoclonius" wary. The "Monoclonius" lets out a trumpet to signal the herd, then keeps walking deeper into the forest. It soon stumbles upon the remains of the "Edmontosaurus" killed by the "Tyrannosaurus rex". While the "Monoclonius" ponders over the carcass, the "Tyrannosaurus rex" sneaks up from behind. 
The "Tyrannosaurus rex" begins the battle by attacking the "Monoclonius" and biting hard on its back. The "Monoclonius" manages to break free from its enemy's jaws and gores the "Tyrannosaurus rex" in its shin with its nasal horn. This enrages the "Tyrannosaurus" which then corners the "Monoclonius" near some trees. The "Monoclonius" lets out one last cry before it is presumably killed. The "Monoclonius" herd hear the call of their separated member but continue to graze after a moment. They call out for its missing member (unaware that it has been killed). The "Tyrannosaurus rex" is last seen trying to find a place to sleep and digest its meal.
Production.
"Prehistoric Beast" was only released in specialized animation festivals, but it convinced Robert Guenette and Steven Paul Mark to request Tippett's skills in order to transform it in a full-length documentary. They then asked Tippett to realize new sequences with other dinosaur species, and the "Prehistoric Beast" material was added to the new one, resulting on "Dinosaur!" in 1985. Tippett had already participated in "The Empire Strikes Back" (1980), animating the tauntauns seen in the film, and his experimental work on "Prehistoric Beast" and "Dinosaur!" served to the animated dinosaurs sequences he made some years later for "Jurassic Park" (1993).
As with the subsequent documentary "Dinosaur!", Phil Tippett, while making "Prehistoric Beast", received assistance from ILM stop-motion animators Randy Dutra (who made the dinosaur molds and skins) and Tom St. Amand (who made the inner articulated metallic skeletons of the dinosaurs).
In the 1933 film "King Kong", a "Stegosaurus" attacks the film characters and after having killed it by gun fire one of the characters identifies it as being "a prehistoric beast". This line, taken from the film, inspired Phil Tippett when giving a title to his 1984 animated short film. An excerpt from this "King Kong" scene is shown in the final 1985 documentary "Dinosaur!", as a reference to "Prehistoric Beast", the short sequence by which it was preceded.
References.
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