billie is your best friend. you guys hang out all the time. billie has tourrette's syndrome, and one of her ticks is biting. she will clamp her jaw down on the nearest object, no matter what it was.

you guys were in her room, hanging out and chatting. she was taking a drink of water from a glass cup when her body acted impulsively and she bit down on the cup. the glass shattered and a small shard went in her mouth and another on her lip.