Six60'S return to Dunedin's student quarter was marred when a man watching the gig fell from a roof, suffering moderate to serious injuries.
Hundreds of young people packed the backyard of 660 Castle St, with dozens climbing on to the roofs of surrounding houses to get a better view as the band played last night at the address from which it took its name.
Campus Watch members and police looked on during the gig.
A police officer climbed on to a roof at one point to try to bring down the most precariously perched.
A St John spokesman said a man, aged about 20, was transported to Dunedin Hospital with moderate to serious injuries after falling from a building in Castle St about 8pm. No-one was arrested at the event.
Southern District Command Centre Acting Senior Sergeant Jared Kirk said the mixing of alcohol and roof-climbing was a concern.
''It was only a couple of years ago that a roof collapsed in Hyde St,'' he said.
Police knew of the ''well-organised'' gig ahead of time and had quite a few resources on hand to make sure it did not get out of control.
Six60 started playing about 8.30pm and finished about 9pm.
The band's second album will be released today.