Ok, this sounds crazy, I realize. However, I've noticed that if I am ever behind a GMC Envoy the V1 goes full laser alert constantly if the Envoy brakes. Maybe it's their third brake light, which looks like LED to me, but I was behind one through stop-and-go traffic for like an hour and I eventually had to unplug the V1. Then, this morning I was at a light, full laser alert again. It was an Envoy in front of me! You have to be pretty close, but it is definately happening. Anyone else?