Kristen Yaldor is lucky to be alive after she was attacked by a hippo. She and her husband, Ryan Yaldor, were on a canoe trip during a safari in Africa for her birthday when the animal came up under the boat and threw it into the air. Ryan got away, but the hippo grabbed Kristen and dragged her under the water. Its powerful jaws clamped down on her leg, but Kristen fought back, trying to wedge the animal's jaws open. She said she tried to stay calm as she saw her muscles sticking out of her leg.