On this episode of Do or Die, jump in and fight off a cage-busting great white shark and use quick thinking to avoid being the underwater predator's next meal. Experience a snowmobiler's worst nightmare when the return trip from a mountaintop turns deadly due to an unstoppable avalanche. Finally, come face-to-face with one of the deadliest reptiles in the United States. Life comes at you fast! Would you know how to survive when it's Do or Die?