Hmm, in my believe, it's from different scene, because, for some reason, Sharptooth looks behind him. I believe he's looking at Mama Longneck. I believe, even if he falls from the cliff, he will not break eye contact from his prey he wants to get so badly, no matter if he will fall or not.
And this can be example of reused animations, when the same or slightly deifferent animation is used in two or more scenes.