I am sure plenty of other people have had this experience, or at least something close to it.
In high school, not too long after I began smoking, some friends and myself were smoking around the corner from one of their houses. We were standing on the street in a dark spot on the road smoking out of a pipe I had made from items in my house. Several cars passed by and when they did we just held the pipe down and the cars just kept driving. At one point a car comes rolling down the block considerably slower than the ones before it. All I could make out was head lights coming our way; eventually I saw some kind of gear atop the car. This was when I began to get nervous. The paranoia of a new pot head was setting in and all I could think was that this was a cop car and we were busted. My friends start trying to make out whether or not this car coming at us is a cop car, and none of us can decide. As the car moves closer I become more and more convinced that this is a cop car, especially because the head lights look exactly like a Crown Vic. Finally I make the call and ditch the pipe into the bushes next to us and just after I do the car makes its way right to where we are standing. It rolls right on past us.
It was a freaking station wagon with a ski rack on the top!!!! I felt like such an idiot. We couldn't find the pipe either.