Two Perth men attacked by a gang of teenage thugs in Northbridge say they are lucky to be alive.

The duo say they are disappointed nobody stepped in to help when they were set upon at the Perth train station around 1.30am after Australia Day.

One of the men, a 22-year-old tradesman who did not want to be identified, was punched from behind before he hit his head on the footpath.

Camera Icon Credit: Catherine Healey

“After watching the video, I’m surprised I’m alive,” he told 7 News.

“He just dropped. He hit the floor. It was scary,” the man’s friend Andrew said.

“It was really quite traumatising to watch.”

The 22-year-old was lucky his shoulder broke his fall.

Camera Icon The victim says it is lucky his shoulder broke his fall. Credit: 7 News

Both men were then repeatedly punched by the teenage gang.

“I really don’t understand why someone would want to do that,” the victim said.

“It’s cowardly.”

The victims say the teens blocked the entrance to the train station, before following them and throwing punches.

The thugs then fled with a limited edition pair of trainers, worth $400, and an iPhone.

“If you can avoid Northbridge as a whole, it’s just a dangerous place,” Andrew said.

Vision of the attack has been handed to police but so far, no arrests have been made.

Anyone with information on the attack should call Crime Stoppers on 1800 333 000 or report it online at www.crimestopperswa.com.au