The driveway is about 120ft from the house, and the cars are behind bushes. The area has a street light, but isn't super bright. It's on an alley. There isn't any real way to run a wire for anything out there. We're going to call the cops, and let them know about it. I guess if it happens a 3rd time we'll have to invest in a floodlight, or something else. I'm tempted to sleep in the trunk and wait for the scratching sound.