Three men were allegedly attacked at a Canberra worksite, a cyclist was rammed off his bike and passing traffic witnessed a man exposing himself in what a Canberra magistrate described as a "bizarrely violent" rampage.

Key points: A man who went on a violent rampage in Canberra's south on Sunday afternoon was suffering from a drug induced psychosis, a court hears

A man who went on a violent rampage in Canberra's south on Sunday afternoon was suffering from a drug induced psychosis, a court hears David Anthony King, 32, is accused of attacking three men at a Hume industrial site, which forced one victim to defend himself with an axe

David Anthony King, 32, is accused of attacking three men at a Hume industrial site, which forced one victim to defend himself with an axe It is also alleged that King, who was refused bail on Monday, knocked a cyclist off his bike and exposed himself in front of passersby

David Anthony King, 32, was refused bail in the ACT Magistrates Court on Monday over eight charges, including an assault which forced one victim to defend himself with an axe.

Police allege Mr King, who was under the influence of drugs at the time, walked up to three men at an industrial site in the south Canberra suburb of Hume about 12:00pm on Sunday, while wearing all black and no shoes.

Court documents read that he began pointing his finger aggressively and yelling at the first man.

When the man turned in an attempt to walk away, Mr King allegedly struck him in the back of the head "about two times," knocking his hat off.

Mr King then started beating his chest and rambling nonsense, the statement of facts read.

He allegedly then put his arm around the shoulder of the second man and said "mate, we've got to look after the kids".

'I love you bro, don't panic'

When the third man walked over to help his friend, Mr King allegedly puffed his chest up and said: "The Lord, don't do anything to harm your kids".

Police allege he then jumped on top of the third man and moved in a humping motion.

As the third man pushed him off, Mr King allegedly said to him:

"I love you bro, don't panic. Andy needs his kids to look after him."

The statement of facts read that Mr King then returned to yelling aggressively at the first man and hooked three punches at him.

He allegedly went back to the second man and put his arm around him, continuing his nonsensical rant about God and children.

He then hit the second man in the temple, knocking off his glasses. When the victim bent down to pick them up, Mr King allegedly punched him again in the face.

Victim turned to axe for protection, court hears

The second man allegedly took the brief opportunity of Mr King turning his back to reach for a nearby axe and wave it above his head.

Each time the man raised the axe in an effort to prevent further attacks, Mr King would allegedly fall to his knees, sometimes whimpering.

Mr King is facing eight charges including common assault, indecent exposure and dangerous driving. ( ABC News: Ian Cutmore )

Police alleged Mr King then walked towards the site office and drove onto the Monaro Highway in one of the victim's cars.

Police said he deliberately swerved in front of a cyclist riding in the southbound lane and hit the cyclist's ribs, causing him to fall off the bike.

Court documents read Mr King then got out of the car and approached the cyclist, rambling about children while seemingly affected by intoxicating substances.

He allegedly grabbed the cyclist by the shoulders before throwing fists at bystanders who tried to help the cyclist.

One bystander allegedly grabbed a star picket from his car to scare Mr King away.

Police allege man exposed himself to traffic

It was at that point police said Mr King dropped his pants and began touching himself inappropriately in front of passing traffic.

He then stood in the middle of the road, the documents read, while trying to wave down traffic.

Police allege they caught Mr King shortly before 12:30pm, running shirtless past Rose Cottage in Gilmore.

While at Canberra Hospital to undergo blood tests, Mr King allegedly admitted to taking methylamphetamine the night before the rampage.

He faced eight charges in court on Monday, including four common assaults, an indecent exposure, dangerous driving and driving under the influence of drugs or alcohol.

His defence lawyer said his client suffered a drug-induced psychosis at the time of the incident, and that Mr King admitted to having a problem with the drug ice.

Magistrate Peter Morrison called the behaviour "very bizarre, very violent conduct" and refused bail.

Mr King is due to return to court next month.