Smile and nod when they pass.

You try to be as unsuspicious as possible, slow down your car a bit, put on your brightest smile and raise your hand as a greeting. The two men in the car don't react at all. You can see that they are wearing black sunglasses. You shrug and drive on.

Then, just a few moments later, you hear the siren and catch a flash of blue light in your rearview mirror. They are right behind you - and they seem to signal you. Your heart starts racing, your pulse quickens. Did you do anything wrong? Surely you haven't been speeding.

You should slow down and ask them what this is about. But what if they are complicit with this whole conspiracy thing?

Relax! You tell yourself. Don't get paranoid! If you start to freak out to the point that you start running from a normal police patrol, you're in real trouble. Just stop and get this over with.