A man suffered serious head injuries in an accident at last night’s New Year’s Eve fireworks in Wollongong.The 43-year-old tried to dive into the harbour from the top of a breakwall during the 9.30pm display, according to the Ambulance Service of NSW.However, the man, who was believed to be intoxicated, hit rocks at the bottom of the wall and suffered head injuries.He had to be freed from the scene by paramedics with the assistance of a helicopter before being transferred to Wollongong Hospital.