The plastic mask that Jason wears is a take on Chewbacca's likeness in the Star Wars films, what with the slicked-back hair and white fangs. Is there any deeper meaning associated with it? Eh . . . maybe. If you really want to get deep with it, perhaps you could make a case that Chewbacca has trouble communicating with people outside his immediate circle, like Jason. (But really, it's probably just because Jason is a little kid who likes Star Wars.)