Been there on a speeding offense in an "arrest me red" (direct FHP quote) Porsche 944 in the 80's. But, having been stopped before, and dressed in coat and tie at 7:30am and late for a presentation for IBM, I just opened my window about 2-inches and handed him my drivers license and registration. No talking.
Trooper went back to his vehicle and gave me a ticket for going 105 MPH, which he said was 5mph faster than the helicopter that was tracking me could go (no comment). This of course was overturned in court (no timing between lines introduced by prosecutor).
Don't talk -ever, fight in court later.