We don't know what happens when the Bear and the Lion leave Teletubbyland in the original sketch, but the Bear might have been killed and eaten, or she fell to her death, but it almost certainly looks like something negative happens. But while most viewers think the Bear is the scary character/antagonist and the Lion is the good character, the chase sequence reveals that the Lion is the real true antagonist and the Bear is the good character and running away from him, perhaps because of his very scary nature. The chase is just meant to be a very simple game of chasies, but the way it's shown makes it much more of an escape than a very simple game with a very tragic end in the original sketch.