NSW man cracks skull during ute joyride

A man has a fractured skull after falling off the back of a ute being driven by his allegedly drunk mate south of Sydney.

Police say the 24-year-old was one of two people standing in the tray of the moving ute in Bowral on Saturday night when the vehicle turned and he fell onto the road.

It's believed he was holding a beer bottle when he was thrown off.

He's in Liverpool Hospital with serious head injuries including a fractured skull.

The 25-year-old driver was arrested at the scene after failing a roadside breath test, police say.

He returned a breath analysis reading of 0.054 at Bowral Police Station and was taken to Bowral Hospital for mandatory testing before being released.