Raptor

This film follows Bride to be Joanne on a night out for her hen party, where she encounters her ex-boyfriend at the same club. She grows increasingly anxious as he follows her around with his behaviour becoming more menacing. This climaxes to the point where he follows her to the bathroom and tries to force himself on her. The power dynamic shifts to where she smashes a bottle and threatens him with it in an act of self-defence.