I tried starting my vehicle and it wouldn't turn over so I pulled the key out of the ignition and the engine kept running. It stopped quickly, so I thought it was weird so I tried again and it made the same vacuum type noise and started smoking, all while the key was not in the ignition. It stopped smoking but I walked away for a sec and came back and the entire place was filled with smoke and the engine had then caught on fire. I was in a parking garage so many other vehicles could have been damaged, and people could have inhaled smoke and other things of that nature. I was also concerned that it would explode and cause even more damage. There was no other signs that this would happen, my vehicle had driven fine the morning of. The car is totaled of course and was towed off.