What happens next?

A young man is seen looking into the camera holding a toothbrush. the man

OPT:
(I). then begins brushing his teeth while looking back to the camera and laughing..
(II). then begins rubbing the brush all over his face..
(III). brushes his teeth using his mouth while giving photos to the camera..
(IV). then begins brushing his teeth in several shots..
(IV).