Butler dad glassed by gatecrashers A Butler man has been assaulted at an out-of-control teenage birthday party. Picture: Alex Coppel Source: PerthNow A BUTLER man was attacked with a bottle when he tried to evict gatecrashers from his son's 15th birthday party. The 44-year-old suffered cuts to his head when he tried to evict about four males from his house about 9pm. The four then joined a group of about 15 people outside the house, who began to throw rocks and bottles at cars and people. Four vehicles were damaged in the incident.