Walking past another unit on our ind est at dinner time a chap who does welding , fabrication, & a bit of mechanics shouted something to me which i didn't hear clearly so i went in, he was standing with his back towards a small gas space heater, chatting to him for a minuet when suddenly he literally burst into flames, oil & some thinners he had on his overalls had ignited, luckily me and another chap managed to roll him on the ground and tear his overalls off, burnt my jacket arms & my hands are pretty red and sore but not burnt, the chap seems to have escaped any serious injury but very shocked, very scary at the time.