A jury has been shown the moment a swinging axe is used to strike a man and a woman leaving a bloody scene at a 7-Eleven convenience store in Sydney.

The dramatic CCTV footage was shown yesterday during the trial of Evie Amati, who is accused of the axe attack at the Enmore store in January last year.

Amati put her head in her hands and wiped away tears as she sat in the NSW District Court dock when the footage was played.

In the new CCTV footage played to the jury, Amati is seen talking to Benjamin Rimmer. Picture: Supplied (Supplied)

After talking a short while, Amati swings the axe into Mr Rimmer's face. Picture: Supplied (Supplied)

The 26-year-old has pleaded not guilty to wounding with intent to murder two customers and attempting to wound a pedestrian with intent to murder.

Her barrister said the jury would have to consider the state of mind and intent of Amati, a transgender woman affected by drugs and depression, and whether a defence of mental illness could be made.

The footage begins with Amati strolling into the store carrying an axe before standing close to Benjamin Rimmer who is behind another customer, Sharon Hacker.

Amati swings the axe with both hands and brings it down on Mr Rimmer's face before he falls to the ground.

Amati then attacks Sharon Hacker before leaving the store. Picture: Supplied (Supplied)

Evie Amati is accused of the axe attack at the 7-Eleven store in Enmore last year. Picture: Supplied (Supplied)

She swings it again and strikes the back of Ms Hacker who also falls to the ground.

Blood is seen on the floor and gushing from Mr Rimmer, who takes off his t-shirt to stem the flow.

Mr Rimmer was in the service station buying a pie, and Mrs Hacker was purchasing a carton of milk.

In evidence given via audio visual link from the UK, Shane Redwood said he was across the road when he saw a woman hit another woman with what he thought was a baseball bat.

Mr Rimmer appeared at the court earlier this week. Picture: AAP (AAP)

But he realised it was an axe when she crossed the road towards him.

"I knew at that point she was going to try and hit me with the axe," he said.

He took off his backpack and used it to stop getting hit when she swung the axe at him.

She tried again, hitting the pack so hard that it flew out of his hands.

Mrs Hacker also made an appearance in court over the axe attack. Picture: AAP (AAP)

He ran across the road but fell flat on his face.

"I was expecting an axe on my head," he said.

He had believed the woman "was going to kill me with the axe".

Nathan Wood said he was walking home when he saw a person in a 7-Eleven store raising an object over their head and swinging it hard.

Nathan Wood leaves after giving evidence at the trial of Evie Amati. Picture: AAP (AAP)

"I saw a body on the floor and blood splatter," he said.

He then saw a second body collapsed on the floor and a woman leave the building "with a dripping axe".

"She has locked eyes with me and crossed the street towards myself," Mr Wood said.

"I realised she was intending to do harm so I made a mad dash to the end of the block."