Prehistoric Assassins/YMMV


 * Nightmare Fuel: All of the predators depicted, but Deinonychus deserves a special mention. Perhaps it's due to the awkward, messy way its feathers are animated, thanks to the less-than-stellar effects, but the animal looks terrifying, and proves that feathered dinosaurs are not all cuddly little chicks.
 * Special Effect Failure: The animals move ridiculously fast at times. The absurd speed of the Daspletosaurus' head as it lashes at the Corythosaurus makes the scene look rather laughable.
 * As a Smilodon jumps on the back of a bison, you can see its paw clipping through the herbivore.
 * Uncanny Valley: The Smilodon. Their faces are in a constant state of derp, border-lining Dull Surprise.