Any one in need of a apprentice mechanic

Ok so on tuesday i was on my computer looking for a job AGAIN. And i turn around and see black smoke belching from my living room floor out of my garage (which is under my house). So i sprint down stairs open the door (burning my hands). The inside of the garage looked like the center of hell. Black smoke,fire and cans of fule burning so i grab the phone and call the firefighters. Then i realise OH SHIT MY BIKE . Let me tell you somthing seeing your new bike in the back of a burning garage is not a nice site. Screw that am not leaving my bike. So i ran in grabed it and somehow got it out (undamaged). Then i realise oh yeah my house is still on fire. So i grab a crappy hose on start to FIGHT THE FIRE. I managed to get the fire out as the fire fighters arravied lol. I lost $700 worth of tools, my new sub woofer,home speaker system and a 6 pack of guinness . But hey it could have been worse. The strange thing is the firefighter said a oil rag spontaneously combusted and set fire to my cans of CRC. It was a cold day and no one was in the garage. Im curious has any one else had this happen to them or no why the rag would burst into flames.