A Black Hill man who allegedly punched a police officer 10 times after being a passenger in a car crash and drinking 12 vodka cruisers was denied bail in Ballarat Magistrates Court on Thursday.

Jessie Newman, 24, is charged with six offences, including assaulting an emergency service worker. He was on bail at the time of the alleged offending.

Police informant detective senior constable Luke Aggett told the court on April 9, Newman was the passenger of a red 2006 Mazda 6, which was being driven by his pregnant co-accused and partner Janelle Colvin-Cassell.

At around 3.10pm, police allege the woman lost control on the roundabout at Albert and Grant streets while performing a burnout, colliding with a silver Mitsubishi Triton and significantly damaging the car's rear panel. The vehicle was being driven by an off-duty police officer.

The court heard there was a four-year-old in the back seat of the red Mazda at the time of the incident.

On exiting the car, Senior Constable Aggett told the court Newman allegedly started punching the victim, who identified himself as an off-duty police officer. In response, the accused said "I don't give a s**t."

The court heard the victim was punched in the head and body ten times, and had "significant swelling" on his face, requiring immediate medical attention. The incident was captured on video.

Magistrate Gregory Robinson denied Newman bail, stating the man's alleged actions were an "unacceptable violent response".

"It would be of great concern to the community that under the privilege of bail someone would go and attack members of the public," he said.

He said it was "extremely serious" when a "24 year old drunk at three o'clock in the afternoon attacks someone, causing that person injuries".

A bystander was allegedly assaulted by Newman during the incident, and police allege the accused man fled the scene, and was seen jumping a fence into a storm water drain before heading to Creswick.

Newman was arrested at his Black Hill home on Wednesday, and in an interview told police he had consumed 12 vodka cruisers prior to the crash and denied being the aggressor in the matter.

When questioned, Senior Constable Luke Aggett said he could not be sure of the victim's demeanor when he approached the car Newman was in, and video of the incident did not capture this moment. 

Defence lawyer Scott Belcher argued Newman should be released on bail as he had stable accommodation with his partner, and was "merely defending himself" when the victim approached his car.

"There is clearly an issue with consumption of alcohol, that could be managed with intervention of the Court Integrated Services Program," he said. "This is an unfortunate set of circumstances."

Mr Belcher said his client had exceptional work history as a plasterer, but became unemployed two months ago after his home was burnt down.

But Senior Constable Aggett said bail should not be granted, as police believe Newman is at risk of reoffending while on bail.

The vehicle the accused was in hit three parked cars and another Mazda which was travelling south on Albert Street on Tuesday.

Newman will return to the Ballarat Magistrates Court on May 2.