Truth is, if I'd slammed on the brakes when I first saw him behind me, he wouldn't have been able to pace me in time and wouldn't have had a good clocking. Depending on the cop, they usually won't write you up unless they're sure the clocking is ironclad.

Sounds like what happened to me once. I was going 65 in 45 mph zone (it'd have been safe at 80 - three lanes, perfectly straight, middle of the night so no other cars around) when I saw somebody catching up with me from behind. Couldn't tell if it is a cop but slowed down anyway, without touching the breaks. By the time he caught up I was only 5 mph over the limit. He pulled me over but I got away with a warning. He must have seen me fly past him earlier but I guess he didn't get an accurate clocking.

Borislav