But it wasn't until he looked inside another resident's ute that he realised a man was inches away from serious injury.
"The ute that was in front of me, there was a guy in there sheltering from the rain. He looked in his rear view mirror and saw the eye of the tornado coming from behind and saw the iron coming towards us.
"He ducked down in his vehicle because he thought he was going to lose his head, and the iron bounced off my wing mirror and smashed into the back of his ute. He thought that was it, he was s****ing himself."
Two buildings were damaged when the tornado struck on Oropuriri Rd in New Plymouth's northeast.
Pioneer Manufacturing Ltd, also known as Metro Fires, was one of the worst hit, losing its roof and a large number of iron sheets.
"Metro Fires was one of the worst damaged, I'd say the lost about 25-30 sheets of iron, with some of it blowing hundreds of metres away and up the valley, Green told the Herald.
A fire service spokesman said they received a call from one business who said a tornado had gone through it and a neighbouring building about 40 minutes earlier.
"It was very minor damage to the buildings," the fire spokesman said.
Roofing iron had been ripped off a building's roof and dumped in a car park.
Assistance from the fire brigade was not needed and no other properties appeared to have been affected, he said.