A “drug-affected” young man who allegedly put a female paramedic in a headlock and repeatedly punched her in the face in the back of an ambulance may have just returned from Rainbow Serpent festival when the incident occurred. Two paramedics were called to Reynard Street in Coburg in Melbourne’s north on Tuesday night after reports a man in his 20s was behaving erratically and knocking on doors in the area. The female paramedic, aged in her early 30s, was treating the man when he became aggressive and allegedly assaulted her. “The patient was in the back of the ambulance and apparently she said there were no cues to suggest he was aggressive,” said Ambulance Employees Australia spokesman Danny Hill.