Left my car in a town centre car park today, when I came back to it 30 mins later, all 4 windows were exactly half way down and the car was unlocked. Nothing was taken from inside, my wallet and Ipod were still in the glove compartment. No sign of forced entry, nothing taken or vandalised at all. Am I crazy to think the car might have malfucntioned all on its own? Unlocked itself and wound the windows down?