A Flinders teen allegedly went on a bizarre drunken rampage on Tuesday night, assaulting two friends before breaking into an elderly woman's home and later using his blood to write "I will kill you now" on a police station door.Joseph Wilson, 18, left a 75-year-old Jamberoo woman's home strewn with glass and blood after smashing windows while the woman and her family hid, Wollongong Local Court heard yesterday.Earlier in the evening, police claim the teen grabbed one of his mates by the throat and choked him before repeatedly hitting another male friend with a torch.When Wilson was arrested, he allegedly smeared his bloody hand inside a police van and used the blood to write a threat on the glass around the police station's dock.Wilson, an administration assistant, was granted bail yesterday after he was charged with 13 offences over the incident.Facts tendered to the court said Wilson had been to the movies earlier in the evening with two friends before going to a Jamberoo home around midnight.Police allege the three men were drinking and Wilson appeared to be drunk by about 2.30am, saying his grandparents were "taking control" of him before he slammed into a window.The teen then choked one of his friends before struggling with the second man, striking him several times with a torch, the police facts said.Wilson later went to the elderly woman's home and smashed about 10 windows, police claim.The woman, who suffers from motor neurone disease and has limited speech, rang her son and daughter-in-law's home and had to make a noise down the phone to alert them.The couple arrived a short time later and called triple-0 as Wilson smashed a glass panel to gain access to the back door, according to the facts.The elderly woman's son sheltered the women inside the bathroom while Wilson tried to bash the door open, the court heard.When police arrived at the home, Wilson allegedly let out a roaring noise and headbutted a glass panel, before he lunged and spat at an officer.Wilson was charged with four counts of destroying property, two counts each of assault occasioning actual bodily harm, common assault, assaulting an officer and resisting arrest, and one charge of aggravated break and enter.Opposing bail yesterday, police prosecutor Coby Davis described the facts as "extremely alarming" and told the court the 75-year-old woman may "never recover" from the incident.Defence barrister Cathy Doosey said Wilson had exceptional circumstances, telling the court both Wilson's parents had long served in the military and could provide support for their son.Ms Doosey said Wilson had never had any behavioural problems or trouble with the law and was devastated over the charges.The teenager had no recollection of the incident, she told the court.Magistrate Michael Stoddart granted Wilson strict conditional bail and adjourned the matter until August 24.