With spooky teethed creatures I'd always imagined that biting the tongue would be WAY more common. Yeah sure you're going eat easier, but that's a dual-edged sword man. :P
...On an actually relevant to this art piece note, nice work with the pose that you were able to get all of the limbs into the clear for a good silhouette. As well I like your use of lighting and shadows, helps to make the spooky eye spookier. haha
Keep it up!