I heard this story once: (bare with me as i need to remember it.)
A copper was on a stretch of road know for the keen motorcyclist which was on a nice coastal route, upon hearing such a motorist he pulls up his hand held gatso and aims it down the road at the power ranger and after a few seconds the gatso scrambles and turns off and the officer is un able to turn it back on, by this time the motorcyclist slowly poodles by him with a grin.
After his shift the PC returns back to HQ with his busted Gatso, in which they found one of the main chips had blown. The man in charge then finds out that it was a military device that scrambled the signal so writes a strong letter to the local RAF base stating that they have let a speeder get away and also wrecked a expensive bit of police equipment and should pay for a new one.
He soon had a letter back from the RAF base saying that at that time they had a fully armed Euro fighter out on a training exercise when it locked onto an hostile radar signal and automatically jammed it and armed its air to ground side winder missile. But the pilot was a biker and new of the road he was flying past and canceled the missile deployment.