Helicopter pilot Greg Gribble helps erect a seven-storey steel Christmas tree in central Auckland, New Zealand.<br/> But as he lowers the aircraft it clips the structure, and comes crashing to the ground.<br/> Gribble is helped out of the helicopter by workers on the site - and walks away relatively unscathed.<br/> Local media said he was taken to hospital with only minor injuries.<br/> Gribble's son Jaz watched as the accident happened.<br/> (SOUNDBITE) (English) PILOT'S SON, JAZ GRIBBLE, SAYING:<br/> "It's pretty nerve racking actually. To see my father, yes, have it come crashing down around him yeah it was pretty nerve-racking."<br/> Gribble has more than 20 years experience as a helicopter pilot, and works out of Auckland.<br/> The Civil Aviation Authority will lead an investigation into the accident.<br/> Travis Brecher, Reuters
