Apexs brutal ending, explained

Sasha, a rock climber, visits a remote national park in Australia to go solo kayaking after an accident killed her partner. She encounters Ben, a ranger, who hunts her to her death, but Sasha survives by biting off half his ear and jumping into the river. They are dragged along by the current, and Sasha breaks Ben's leg before they must climb a large cliff face together to escape.