>>>>>>
>>>>>>
>>>>>>What is it that revolves on the roof of a police car?
>>>>>
>>>>>Nothing.
>>>>
>>>>How so? What about when the cruiser's blue and red lights are on>
>>>
>>>On american police cars everything is fixed to the roof and nothing revolves on the roof.
>>
>>So how do the lights describe a circle?
>
>They probably say "it's a curved line where all the points are at the same distance from a central point"... but nobody knows the light language, so this is under some serious doubt.

Enough of the puns already! :-)

How do you like the fact that doctors insult the body when they inject you?
All because some disease has challenged the body.