Back in my Z-car days: one of the Z-car club guys was driving through New Mexico in his 280Z on the way to nationals. He crested at hill at a pretty good clip and saw a cop writing another driver a ticket on the other side. The cop got in his car and pulled over my buddy. As he was writing the ticket for 65 in a 55, my buddy asked how he could tell how fast he was going considering he was outside his car when he witnessed my buddy crest the hill. To which the cop replied, "when you've been doing this as long as I have you can tell how fast a car is going."
My buddy happily took his ticket for 10 over the speed limit knowing he had to be doing at least 120 when he crested the hill
