A Friday Limerick

Author unknown, but I love it.

Some Guinness was spilt on the bar-room floor
        Just around closing one night,
And a wee little mousie crept out of his hole
        And into the pale moonlight.
He lapped up all of that dark frothy brew
        And back on his haunches he sat,
And all the night long you could hear that mouse roar,
          "Bring on that god-damned cat!"