Nightmare Fuel / The Stomping Land

• Stygimolochs. Skull like face with black coloration? Check. Annoying Habit of popping up without warning? Check. Exceptionally Fast? Check. Extremely Common? Also Check.
• Any Dinosaur after dark can give you a good shock, Carnotaurus in particular.
• Carnotaurus in general is made of this. It's very loud, and the tension can be very unnerving. It's also basically an instant kill, so unless your friend has a Healing Herb....