A mouse at Hangzhou Zoo in China has been given its freedom after zookeepers witnessed it attacking a venomous snake to save its friend. "We always give the snakes live food, and we put the two mice into the snake enclosure. But instead of trying to hide like they usually do, one of the mice attacked the snake when it saw it trying to eat the other mouse. I have never seen anything like that before," keeper Wen Shao said. Sadly, the mouse's buddy died, but our hero can rest assured knowing he did quite a bit of damage to the snake by biting its head, according to Shou.