obviously there was a fault, a voltage or amperage spike that caused the car to react the way it did. this could have come from a host of switches, like the trunk, etc. I don't think you have anything to worry about at this stage. Everyone should pay close attn to the trunk area. Moisture in that area, from leaky spoilers, to wet clothing, coolers isn't something you want in that area with all the electronics that under the mat....