It takes a blink of an eye. 2. Be vigilant and conscious of your environment checking out for their footprints and fresh droppings. 3. Unanimous gifting. But you are the one who they are after. 4. Stumble on each other when you are out of the house. 5. Frequent phone calls. 6. The constant appearance of weird things in your house. 7. Dog mortality. i.e your dog is dead. 8. Run after you while driving and try to rip off the car door. 9. It kills anybody who tries to save you. 10. It walks through the inferno to get you with an ax on his head. 11. If eventually succeed kills you.