There's an honorary fireman at Warrawong Fire Station who has the useful talent of being able to walk through walls.
Then there's the little boy who stands watch at the window.
But look twice and he's gone.Both are believed to be ghosts haunting the station, catching firefighters off guard with their spectral appearances.
Station officer Jason Harvey said the first sighting dated back to when the fire station was opened in 1998, and had continued ever since.
Mr Harvey said the image most often seen was of a solid, bushy-bearded man who resembled a bushman.
"There's been three or four firefighters who have actually seen a figure in the hallway.
"They've all basically described the same thing, a big hairy-looking male," Mr Harvey said.
On one occasion, the figure was also seen to walk through a closed door.
The most compelling evidence is 10-year-old video footage showing a boy's reflection on the glass panel of an internal door.
The image was captured by senior fireman Peter Fitzpatrick, who was compiling a farewell presentation for a colleague.
When it came to editing the footage, he noticed something strange cross his vision.
"I got annoyed because I thought there was another firie standing in the background. But then my wife said, 'No, that's a young boy'," he said.
Mr Fitzpatrick said he spoke with colleagues about the boy, but was told no child was at the station that day.
The video was shelved until recently when he began compiling new footage for another colleague's retirement.
At the same time, the officers were told of a triple road fatality that occurred at the site in 1990, when a 44-year-old Mt Druitt man and two Lake Heights men, aged 25, were killed.
It was then that firefighters decided to call in the experts to determine if the station was haunted.
Enter Ghost Hunters Wollongong, a team of investigators led by Corrimal High School science teacher Paul McCaffrey.
"We're a bunch of sceptics. We keep an open mind, but we try to come up with scientifically-based explanations," Mr McCaffrey said.
Armed with high-tech equipment, he and three colleagues spent a night at the station.
While the results are still being examined, Mr McCaffrey did have an opinion on the fire station video: "It's either the best paranormal evidence I've ever seen, or there's a logical explanation," he said.