A group of foilboarders have filmed themselves cruising along on the wake of a ferry in Auckland, but the company says it doesn't appreciate it.
The four - who named themselves in the video as Juan Cumar, Aaron Candy, Paul Butterworth and Mike Cann, took two jetskis out into the harbour on a flat day and filmed themselves, writing "No wind ... no waves ... be inventive."
As they skillfully ride the wake of a large passenger ferry, people onboard can be seen watching and pointing.
They posted the video online on Sunday, but ferry company Sealink told Newshub there are "risks to participants of a high speed collision".
The law states that jet-skiiers should stay at least 50m from a person or vessel.
Sealink said they had raised the incident with the Harbourmaster's office.