The guy on the right of the screen (for most of it) ruined the illusion slightly by standing too upright and not bowing his head. He looked like a biped holding crutches, whereas the other two really looked like quadripeds. Very cool! And I loved the animalistic interaction where it appeared as if the larger parental figure was silently chastising the smaller figure for scaring his sibling. I'd love to see the whole performance. =)