Wierdiest thing ever! Help anyone?

[Pushit2.0]

So if the key was not in the car how did you shut if off? Or did it die when you went into the garage? JET is correct the ignition switch would have needed to be on and power going to the MPI relay and the ECU/fuel pump other wise a shorted wire to activate the start would only turn the motor over, but it would not start. I would assume the garage was filled with exhaust fumes and the radiator and such was warm/hot from the car running for 15min?

~John
another vote for spirit or somthing. I was at home watching tv and at 1am in the morning the light over me turns on for no reason, that was wierd.