How dumb is it to power a power tool, say a jigsaw, from the cigarette lighter socket using a 12v to 240v inverter? There are rare times I need to cut a small amount of wood at the shop car park to fit it in the car. I don't have any battery powered tools and don't want to buy them if I don't have to. Hand tools would be too slow and might cause a complaint. I am thinking of doing a quick ninja cut and done before anyone has time to react.