I think it is fun to act like you have a radar gun.....
I carry around a brick radio everywhere I go for work, and the other day I was posting out at the Score Baja Race in Primm. I was sitting in the command rig all day (which has lights on the top of it) parked facing the road on holding the radio up so it looked like a radar gun , and it was good entertainment for about 45 minutes, watching everyone hit their brakes...
Sorry a little bit of a side story that I wanted to share.