Freak accident as man adjusts TV aerial

An Australian man was critically injured when he fell from the second-storey roof of his house and became wedged between two brick walls.

It's believed the 38-year-old man was adjusting the television antenna on the roof of his home in Sydney's Surrey Hills, when he fell and became wedged between the brick walls of his house and a neighbouring industrial premises on Wednesday evening.

Ambulance Victoria spokesman Gary Robertson said paramedics and firefighters worked for two hours to free the man.

"He was incredibly difficult to access. He was unconscious at the time. We used the help of the MFB (Metropolitan Fire Brigade) to break into a neighbouring factory and come through some windows to get to him," he told the Fairfax Radio Network.

"It was a very difficult extrication from the scene and we managed to get him out to the ambulance and treat him there.

He was taken to The Alfred hospital in a critical condition with serious head injuries and multiple fractures and underwent surgery overnight.

- AAP