Devon Kilkelly volunteered at the school and is the latest recipient of the ASB Good and Gold Award on Seven Sharp.
Thanks to the two girls in Central Otago, one of NZ's estimated 40,000 homeless has somewhere to stay.
Onlookers were held back by security tape as the water swirled around empty tables and chairs at the popular shopping district.
Graphic warning: There are fears about Otago student culture, after footage of the wild initiations emerged on social media.
During the event, Dunedin rock legends The Clean will also be inducted into the New Zealand Music Hall of Fame.