I was driving home from work on Monday and I was behind a convertible witht the top down. We were on a long stretch of road with one lane in each direction. The guy driving the convertible was about 50 years old and was very SLY. I was behind him for about 20 miles and he was rubbing his head the entire time........ estimated time of head rub - 25 minutes. He was still rubbing as he turned off the main road.