Zombies took over the Old Bus Depot Markets on Sunday, using their powers for good to promote a new disaster preparedness program.
Onlookers were startled as the living dead poured into the markets, but were quickly put at ease as they began to dance to Michael Jackson's Thriller.
Event organiser and Green Cross Australia project manager Elizabeth Resta said the public were thrilled by about 20 people dressed as zombies.
''It went really well,'' she said. ''It was just a lot of fun.''
The zombie flash dance was intended to promote a new disaster-preparedness website, Act First. The website, specifically designed for residents of the ACT, encourages people to be prepared for large-scale disasters such as fires, floods and earthquakes.
''The website is an online resource for disaster preparedness. And the theme today was if you're prepared for a zombie apocalypse, you're prepared for everything,'' Ms Resta said.
She said Act First could help Canberrans take steps to protect themselves, by tailoring a unique disaster action plan for them. Act First is a project by Green Cross Australia, a not-for-profit organisation which helps people gear up and prepare for the future.
''Green Cross Australia really wants Australians to be ready for the complications climate change might bring, be that rising sea levels or bushfires. We want people to be prepared and resilient,'' she said.
Zombies were chosen to publicise the website to equate preparing for a zombie apocalypse and a real disaster, she said.
''You need a supply of food, a supply of water, torches and you need to have a plan,'' Ms Resta said. ''We leverage on the zombie apocalypse to just get people to think whether or not they're prepared.''