When I get pulled over for speeding, I always politely ask if I could see the radar gun, then usually follow it up with some sort of joking remark, so as to not come off as an ******* to the guy. Several of those times, the officer said "I didn't have you on radar, but you were clearly speeding." I got out of every single one of those tickets just by asking to see the radar gun.
I've been pulled over I don't know how many times for squealing tires, unnecessary acceleration, etc, and I've always argued my way out of it. "Sorry sir, I just replaced the clutch and its a little tight." .. "My first day driving my new car sir, not sure how to work a stick shift yet." .. "My fault sir, my wife was driving the car and had the seat all screwed up, I could barely reach the pedals!"