That is, driving down the highway at a speed of 70 mph and taking photos of the vehicle ahead of you. First of all, it's dangerous because it distorts your perception. Second, the person in front of you might be up to no good and wonder who the heck has the camera pointed at the back of his vehicle. Third, the car on your right (a man, of course) might start honking and and nearly poking his own eyes out while trying to motion to you to keep your own eyes on the road. Geez, I was merely amused at the sight of this. I saw it as a cute little robot smiling and waving to me, kind of like ET. I'm getting carried away with this photo a day thing.
Tomorrow I think I'll take a "still" shot.