This reminds me of a 'thread' in the letters page of one of the national motoring mags a few years ago. People were writing in giving examples of those fantastic sarky things that traffic cops had said to them upon stopping them for speeding.
After a few, the winner's prize was won outright by a bloke who told of being pulled over in his 911 having been clocked at over 100 on the M25 at two in the morning. Apparently the cop took ages getting out of his car and sauntering up to the driver's window, whereupon he said:
"Good evening, Group Captain. Having trouble taking off, are we?"