The myth is on the Show "Breaking Bad", the main character runs into a character he doesn't like a petrol station. So what main guy does is approach the other mans car opens the bonnet, grabs a squeegee that you'd find a petrol station, and places it in between the positive and negative charges of the cars battery. After doing this he closes the bonnet, walks away, then the car just explodes into flame.

I thought of this one too! we do like explosions.

No. The battery MIGHT explode if the squegee is made of a conductive metal, but not the entire car. Just another case of Hollywood BS.