Intrepid volunteers donned helmets, strapped into harnesses and abseiled down one of the city skyline's most notable buildings - all in the name of charity.
Staff from Nottingham City Homes clambered down Willoughby Court - one of the famous five Lenton flats buildings which are being replaced by new housing.
Around 50 people - which also included workers from Total Reclaims Demolition and the School For Parents charity - participants are hoping to raise thousands of pounds which will go toward the Sneinton-based initiative which teaches parents to care children who have disabilities.
Sam Hill is the fire safety and first aid officer at NCH and was the first person to bravely step over the edge of the building. Fresh after finding her feet back on firm ground, Sam said: "I'm a bit shaken but it was really good fun.
"The initial bit where you lie back was very nerve-wracking when it's a 45 metre drop. I kept checking the ropes and things, but you've got to just keep going."
The 30-year-old from Mapperley added: "When they organised it I think mine was the first hand to go up. I've done quite well fundraising and already have £150.
"It's a great thing overall - it's been absolutely brilliant and will raise lots of money. The response of staff has been great."
Sheryl Fraser is NCH's tenancy and estates manager and has worked for the organisation for ten years.
The 58-year-old from Radford also completed the abseil and raised around £150. "It's the first time I have done anything like this, and I don't think I will do it again," she said.
"You've got to be mad or brave to do it. "I didn't look down at all, I just wanted to go faster and get to the bottom as quickly as possible." She added: "If everyone raises a little bit of money it will be great. It's for a really good cause.
"These people [the School for Parents] do incredible work training people to be able to cope with looking after their child."
The redevelopment of the area has already seen three of the blocks of flats torn down with demolition of the other two to begin soon. Some of the replacement housing is already being built and the whole project is expected to be completed in 2017.
The flats, which are situated just off Derby Road behind the Savoy Cinema will be replaced by 140 new homes in total.
Nottingham City Homes chief executive Nick Murphy said: "The event has taken a lot of organisation obviously. But when we announced it a forest of hands went up - the staff have been incredible and have all shown their support. It's been a great day."
Speaking about the demolition and regeneration project, he said: "It's going really well. The blocks are coming down and the new homes are already going up. We're really pleased with progress."
