A mate drove past a manned camera, and it pinged him. Irritated,...

A mate drove past a manned camera, and it pinged him. Irritated, because he knew he was under the 60 limit, he went round the block and went past at 50. Ping! Now getting cranky, he went around again and went past at 40. Ping! Furious, he stopped, and asked the copper what he was playing at as he had been done three times when he was definitely under the limit. "Ah, Sir, I'm sure you were under the limit, but I have three nice photos of you not wearing your seatbelt ...."