Walks in one direction and tries to eat you. Getting close from behind triggers AV. Petting in the right location will put you in a cage he makes with his claws. If you fail to get out you will be eaten. He turns around if he gets too far away. Once eaten you can try to make the different cards light up in the top right ba various means of struggling. You don't get anything though if you manage to do that. Aslo is a special Therizinosaurus that eats meat when the real ones dont