Watch as humpback whale flicks a surfer off his board in Sydney

Jason Breen, 55, was surfing on Sydney's Northern Beaches on October 25 when the juvenile whale popped out of the ocean.

Mr Breen said the incident could have taken a tragic turn. The whale was caught in Mr Breen's ankle rope after the two collided.

"I thought it was all over," he said after the incident.

He was dragged under the water "20 or 30 feet" before the ankle rope snapped and Mr Breen resurfaced.

"It was a big calf, if it had barnacles I would have been ripped apart because the whale's body was beside me the whole time," he said.

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A second angle of the incident was filmed by onlooker Paul Netteback who was watching the wing surfer from afar.

"I wanted to keep filming but then I thought someone might have just died, so I stopped filming and I got triple zero ready," he said. .