Mr Te Kowhai, who spends most days in court helping people understand how the system works and providing support, said in the six years he'd been attending court he hadn't been involved in another bomb threat evacuation.
He said there wasn't any panic when people were leaving.
Another man said he was frustrated having to wait around outside not knowing what was happening.
The man, who was due to appear in court, said he just wanted to get back inside and get it over with.
"Everyone just thought it was a hoax."
It is understood a police prosecutor was alerted to the bomb threat and then alerted other staff.