Senior Sergeant Anthony Bond, of Dunedin, said police were called to Aquinas College at 9pm on Saturday during their yearly ball for first year students.
Police were called after two different groups got into a fight, leading to a 20-year-old student punching another 20-year-old in the mouth.
He was arrested and charged with assault and he would appear in Dunedin District Court at a later date.
About an hour later, in a separate incident in Castle St, police were patrolling the student quarter when they stopped to deal with an overly-intoxicated man.
While stopped, officers heard the roar of an engine and tyres screeching before they watched a car drift around the corner and head down Castle St before fishtailing along the road.
The 20-year-old driver was stopped by police and he recorded a breath alcohol level of 1002mcg.
He was arrested for sustained loss of traction and driving under the influence of alcohol, his vehicle was impounded and he was bailed to appear in court at a later date.
