For the past few months this has happened to me about once a week (it happend tonight and last Thursday). I work at night and am travelling this 2 lane road between 8:25 and 8:40pm 4 nights a week. I pass a car coming from the opposite direction, he switches to high beam and within a few seconds a light on top of the car flashes, just like a camera flash. I got a good look tonight at the light when it flashed, it's a round light and it is definitely on the roof of the car. It is definitely NOT an emergency vehicle light, it's just 1 light and it's in the center of the car on the roof. Now while this is just an annoyance to me, it might actually cause an accident for someone who is startled by it or has bad night vision (there are a ton of retirees in our subdivision). It is dark so I can't make out the color of the car or make of it, it is a small sporty car, I actually think it's an Acura Integra by the rear lights but can't be positive. My ? is, should I report this to the police? I'm sure this person must be coming home from work or school because I pass them around the same time in the same stretch of road.