Suddenly there is a huge *THUD* on the roof, followed by a splintering/crashing sound and a new hole in the roof has been formed. Right over the bar and the hapless duck. Through the hole plummets (in a controlled way) a large purple bespectacled walrus, landing squarely on the duck, mashing it flat.

"GOO GOO GOO JOOB!" roars the walrus, which heaves it self off the duck-stained, splintered remains of that section of the bar. It starts walrussing (what else would you call it?) towards the North door.