I thought we (and you) were talking about "clown limousines". When I was a kid my whole family went to the Big Top to see the Barnum & Bailey Circus. It was great, including the clowns. Between acts the clowns came out in a clown car, a tiny car with a cop motif and a flashing light on top. Then the doors opened and something like a dozen clowns wearing police helmets came out, chasing each other with billy clubs. I was probably eight years old and I thought it was hilarious. Also, I bicycled over with a mob of kids to watch the elephants pull the ropes to raise the big tent. Now, that circus is gone.