Commander Dizaei allegedly bullied the web designer
A police commander remained unruffled despite summoning urgent help after accusing a suspect of threatening behaviour, a court has heard.
Pc Andrew Moore was surprised to find Ali Dizaei with no clothing out of place after calling for help, Southwark Crown Court heard.
Police officer Mr Dizaei is on trial for attacking a web designer in London.
Mr Dizaei, 47, denies assault, false arrest, misconduct in public office and perverting the course of justice.
Prosecutors claim Mr Dizaei falsely arrested Iraqi web designer Waab al-Baghdadi, lied about an assault and left the young businessman facing a police inquiry, all charges which he denies.
The court heard Pc Moore was one of several who responded to a call for urgent assistance from senior Metropolitan Police commander Mr Dizaei at a Persian restaurant on 18 July.
"He was incredibly smart," said Mr Moore.
"Bearing in mind I had just gone to urgent assistance, an off-duty assistance, that is not always the scene I would have expected to turn up to.
"Ali Dizaei was holding the male. He was incredibly smart. His clothing was not dishevelled at all and the scene appeared very calm," he added.
The senior officer later told his colleague: "I cannot believe this has happened. I even know the guy," the jury heard.
The jury watched CCTV footage of a police car pulling up outside the restaurant and an officer walking inside.
A second officer, Pc Andrew Collett, said he was met with silence from customers, who included Mr Dizaei's wife, when he asked if an officer needed help.
"I was met with silence despite the premises being quite busy with customers," he said.
"Usually if there is urgent assistance there is a whole lot of violence, usually people will come up to you".
Mr Dizaei was holding his left arm and shaking his wrist as if injured before he handed an officer the mouthpiece of a shisha pipe and said he was attacked with it, the court heard.
The trial continues.