A man has been caught on CCTV leaving a messy surprise outside builder's office at a controversial Wollongong construction site. Video: Illawarra Mercury

First there was the poo jogger, now we have the poo protester.

CCTV footage has captured the moment an apparently disgruntled man leaves a messy surprise outside a builder’s office at a controversial Wollongong development, the Illawarra Mercury reports.

Surveillance footage obtained by the newspaper shows a paunchy gentleman saunter up to front of Hutchinson Builders’ construction office on Keira St about 8.30pm on March 15.

He turns to face the street, looks around for any witnesses, then backs up to the small ramp outside the building.

He pulls his pants down and squats, leaving two surprises. He pulls his pants back up as he walks away, pausing briefly to wipe his backside with his hand.

The man was wearing a beanie, jumper and shorts.

A Wollongong police spokesman told the Illawarra Mercury an officer was investigating the incident but they had not yet viewed the footage.

“A person has not been charged and that will only happen if someone can be identified from the footage,” he said.

According to the newspaper, Hutchinson Builders is carrying out excavation work for the PARQ on Flinders development, which has attracted complaints from local residents about noise, dust and safety conditions at the site.

It’s the latest in a string of public pooping incidents.

Last year, a Brisbane corporate executive dubbed the “poo jogger”, made global headlines after fed-up residents of an apartment block where he regularly deposited his wares hatched a plan to catch him in the act.

Not long after, Sydney was hit by its own poo jogger — a blonde woman caught on CCTV defecating outside a Pyrmont bottle shop — initially thought by local business owners to be a large dog.

That was followed by two university students in the UK who watched as a woman crept onto their driveway to do “huge” poo in broad daylight.

In the US, a female jogger dubbed “the mad pooper” became public enemy number two for Colorado Springs mother Cathy Budde, who complained of the mystery woman defecating on her lawn at least once a week for over two months.

Then there was the “poo bomber”, a Sydney kleptomaniac who got such a rush while shoplifting that experts said she lost control of her bowels and defecated in shops before leaving.

While there has been little study into the motivations behind public defecation, psychologist Sandy Rea has speculated that it is partly the “thrill” of not being caught.

“They get a thrill, they get an arousal, but underlying that gratification is anger and a thought disorder,” she said.

“It is a big f**k you, and is where the thought and anger of the disorder comes. The repeat behaviour, and never getting caught, reinstates the ‘I’ll do what I want to do’ mentality.”

Ms Rea said it could also be due to “elimination disorder”.

“This can occur when the person is really angry at someone or something,” she said. “Perhaps a person or organisation. This is a revenge. The person feels entitled. If I want to do this I can, and I will.”

frank.chung@news.com.au