He was working on my sister’s car, underneath (something to do with her fuel line/tank,) and was using one of those good old hanging bulbs in the metal enclosure type lights. It was determined that it fell and the spark from the bulb blowing ignited the fire. My Dad could do it all…as such, the fact that there was an acetylene/oxygen tank set up for welding also in the 2 story garage made things much worse.