They had been rushing to a road crash when the accident happened on the A948 Ellon to New Dear road near Auchnagatt, Aberdeenshire.
Tony Whyte, of Grampian Fire and Rescue's transport department, said: "I reckon none of the guys will ever be so lucky again.
"It's really unbelievable that the truck went so far down the hill and no one was badly hurt."
The 18-tonne vehicle, which was based in Ellon, ploughed through a tree before it was stopped by another two trees.
Tony added: "It was a rough night and that's a bad bit of road with 90-degree bends."
The crew managed to escape through the windows after Saturday's crash.
They were treated for cuts and bruises at Aberdeen Royal Infirmary. Only one was kept in overnight after suffering concussion.
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Written by Daily Record
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