in "silly faces" or "eyes crossing" about hits on your head? You have to change expression after the hit on head: if you are smiling change in serious and viceversa: after the hit, wide eyes or crossed eyes, but overall a little faster the swinging head and you fall disappearing under the camera (I advise falling on a pillow to avoid injury) of always swinging your head (right/left/right/left ecc), sometimes circling your head and always disappearing under the camera. I attached this collage video for your suggestion, I saw you very capable to make funny or idiotic faces