Officials are investigating after a uniformed firefighter was apparently filmed being spun in a tumble dryer.
Fire chiefs are investigating the incident
Greater Manchester Fire Service believes the prank took place at one of its fire stations.
Chief Fire Officer Barry Dixon said the fire brigade was investigating the "reckless act".
The video shows a uniformed man climbing into the industrial drying machine and packing clothes around to cushion himself.
He is heard to tell colleagues, "As soon as I say, let me out".
As the machine is switched on people start laughing.
Mr Dixon said: "A full investigation has begun and initial information would suggest that it is one of our personnel."
A fire service spokesman added: "It is blatantly obvious that getting into a tumble dryer, especially of industrial design, is not only foolish, but dangerous in the extreme."
The Fire Brigades Union said it would not comment until the fire service investigation had been carried out.