A critically-ill father owes his life to Facebook after his mayday message on the social networking site was picked up by friends 6,000 miles away in America.
Peter Casaru, 59, woke up at night unable to move and his only way to alert anyone to his predicament was to reach his laptop 10ft away.
It took Peter an hour and a half to reach it and then he tapped out the words on Facebook: "Can someone call 999, ambulance for me, I need one now..."
Friends in New York and Vancouver who were still awake saw the message and called the emergency services, and 20 minutes later two ambulances turned up at Peter's remote cottage near Brecon.
He was rushed to hospital in a critical condition, where doctors said the spinal spasm could have killed him without emergency treatment.
Father-of-one Peter said: "My only hope was Facebook. I have no doubt it saved my life.
"I managed to tap out a garbled message asking for help and my Facebook friends responded immediately."
Peter was in a quad bike accident four years ago which left him with recurring spinal problems.
He knew it was flaring up again so he moved downstairs in the cottage where he lives alone in the Brecon Beacons National Park.
When he woke up screaming in pain, Peter reached for his mobile phone to get help but the battery was dead.
He said: "I could see my laptop on the table but it took me an hour and a half to reach it.
"I was literally screaming in pain every inch of the way and when I got there I realised I didn't have my glasses.
"I couldn't see the keyboard or the screen but I managed to type out a message asking for help."
Peter's Facebook friends in America, Canada and all over the UK began calling the emergency services.
Businessman Peter said: "I was close to passing out with the pain and just lay there hoping that help was on its way.
"I was so relieved when the door opened and a team of paramedics walked in."
Peter, who runs a computer shop in Brecon, was on crutches yesterday after four days in hospital.
Unmarried Peter has posted a new message thanking Facebook and all his friends on the site for saving his life.
He said: "I don't think I would be here without my Facebook page.
"I've always used it to keep in touch with family and friends but it turned out to be a real lifesaver."
American friend Ian Taylor said: "I'm just glad Peter is OK.
"That's what friends are for." A Welsh Ambulance Service spokesman said: "We had a number of calls thanks to the message the patient sent out on Facebook.
"We are glad we got to him in time and he's doing well."