When you think of a bear, especially a grizzly bear, you think of a terrifying roar penetrating every part of the forest. It’s a scary thought, especially if you were to end up between a momma bear and her cubs. This small boat on the Kamchatka River in Russia encountered a bear that was apparently moving across the river as well. It didn’t seem to care that it was neck deep in water. It wanted to ward off these humans. And this deafening roar certainly would do the trick. That sound is the stuff nightmares are made of.