But Kerrod Matthew James Edwards' lawyer insists he entered the Kambah house with permission to retrieve car keys, and that he only picked up a machete so it would not be "stuck into his back".

Mr Edwards is on trial in the ACT Supreme Court, charged with aggravated burglary in company while armed with an offensive weapon. He has pleaded not guilty.

Closing the Crown case on Wednesday, prosecutor Sarah McFarland said Mr Edwards went to the house just after 3.30am on August 12 last year to launch "a surprise attack".

Urging Justice David Mossop to find Mr Edwards guilty in the judge-alone trial, Ms McFarland pointed to text messages sent the day before the incident.

Tensions had been running high as Mr Edwards looked to get his hands on the keys to a Mazda 3, which he claimed was his.

The keys were in the possession of a man who lived in the Kambah house, and Ms McFarland said Mr Edwards' partner had sent him a message saying: "Don't kill the poor c---."

In response, Mr Edwards had written: "I don't give a f---. I'm going mad and I won't stop. They all getting f---ed up."

The prosecutor said Mr Edwards had also contacted the mother of the man who had the keys, urging her to tell her son to hand them over.

"It's only getting worse for him now," Mr Edwards allegedly wrote.

Ms McFarland said Mr Edwards then acted on his intentions by going to the house in the early hours of the following morning.

"He went there with the intent to f--- [the man] up, to get his car keys," she told the court.

The Crown's case is that Mr Edwards trespassed into the home with a co-offender, Melissa Baker, and stood over the man in his bed with a machete while Ms Baker guarded the bedroom doorway.

The man has told the court he cannot remember anything like this, but his mother and sister have given evidence of seeing Mr Edwards pointing some sort of blade at the man.

The man's mother has also described Mr Edwards wielding a piece of metal, which the Crown says was a tyre iron.

But defence lawyer Sam McLaughlin, in his closing address, said there were "very significant problems" with the Crown case.

He conceded Mr Edwards had "made some unfortunate comments" in the messages, but he described them as "chest-beating" and pointed out there was no allegation of any harm actually being inflicted.

Witnesses to the alleged offence had also given unreliable evidence about weapons, he asserted, having variously described a machete and a smaller knife.

Mr McLaughlin said there was no evidence that Mr Edwards and Ms Baker had agreed to enter the house to commit an offence, or that they had been armed at the point of entry.

Ms Baker only went, the defence lawyer said, because she was giving Mr Edwards a lift.

According to him, the most reliable evidence was that the only weapon was a machete that had already been in the house.

Mr Edwards had merely picked the machete up on the way out and left with it, Mr McLaughlin said, because he feared it would be "stuck into his back" if he did not take it.

Mr McLaughlin has previously said the man who had the car keys willingly let Mr Edwards into the Kambah home, where there was "a discussion" and the man was "apologetic" about not having given the keys to Mr Edwards sooner.

But Ms McFarland argued that even on Mr Edwards' version of events, there was a point where the occupants started yelling in fear.

She said at that stage, even if Mr Edwards believed he had entered the house with permission, consent to be there had clearly been withdrawn and he was trespassing.

It was "nonsensical" and "bordering on incredulous" to suggest otherwise, Ms McFarland claimed.

Justice Mossop reserved his decision, saying he expected to give it on Friday afternoon.