A 63-year-old father is fighting for his life after being coward-punched in the head while helping a teen in a car accident.

Rob Seddon rushed to help a 17-year-old who crashed his Toyota Corolla into a caravan outside his home on Skyhawk Ave in Hamlyn Terrace on the Central Coast around 10pm on Saturday.

Along with other neighbours, Mr Seddon assisted the teen before they were ambushed by a group of males who attacked them.

Mr Seddon was allegedly hit from the back on the head which caused him to fall backwards, hit his head and lose consciousness.

He was flown to John Hunter Hospital in a critical condition where he underwent brain surgery and remains in intensive care in a coma.

Mr Seddon’s 21-year-old son was also allegedly attacked and suffered a broken nose.

“I could hear the sheer horrible noises from this guy that was being hurt, I had tears in my eyes, I knew it was bad,” neighbour Diane Gardner told Nine News.

“It was absolutely horrible. You could hear his pain and he wanted help.”

Police are asking anyone with information about the alleged attackers to come forward.

The 17-year-old driver who crashed into Mr Seddon’s caravan was breathalysed at the scene and returned a positive blood-alcohol reading.

He was then charged with negligent driving and drink-driving on P-plates.

Images: Nine News

This article first appeared on OverSixty.