the practice of several people attacking somebody while another person in the group makes a film of the attack 开心掌掴（指几人围殴一人，由同伙将袭击画面拍下） A victim of happy slapping hit back at one of the attackers and broke her ribs. 一名高兴打耳光的受害者向一名袭击者回击，并打断了她的肋骨。 Schools banned camera phones because of the happy slapping craze. 由于拍手狂潮，学校禁止拍照手机。 a happy slapping video 一个快乐的拍手视频