"What is life without risk and adventure?" asks one of the young men who features in a video showing free-runners scaling scaffolding and leaping from rooftops at a Northland school.
But not everyone is impressed with the antics in the video posted online, with a Whangarei principal concerned unskilled copycats will get in on the act.
Part of the video, which the four participants posted online, is filmed at Hora Hora School and principal Pat Newman said the acrobatics - which included flips, high-speed leap frogging and bounding between rooftops - caused minor damage to school buildings. This was denied by the group involved, who said they carefully checked they had left no trace.
"But my big concern is the safety," Mr Newman said. "I don't want to have to turn up to school and pick up the smashed bones off the concrete ... I thought hells bells that's skilful, but doing it off the roof of a school is cuckoo mad. I also don't want all the kids in town trying to emulate them."
Mr Newman said he had sent the video to police and hoped officers would speak with the young men about it.