face seizure
A seizure face is a human who acts like a happy dog who just got a bone. They breathe like a dragon, rock their head like a madman, and stare at you like you just told them they won the lottery.
'He looked at me like I just told him the pizza was free.'
'She was head-rocking so hard I thought she was going to fall out of her chair.'
'He looked like he had just been hit with a happy punch.'