Guinness - The Mouse on the Barroom Floor

'Some Guinness was spilled on the barroom floor
when the pub was shut for the night.
Out of his hole crept a wee brown mouse
and stood in the pale moonlight.
He lapped up the frothy brew from the floor,
then back on his haunches he sat.
And all night long you could hear him roar,
'Bring on the goddam cat!'