One bat hanging in the steeple
One bat flies in through the door
That makes two bats in my belfry
WONDERFUL!
(spoken) But wait, there's more ...

Two bats hanging in the steeple
One bat flies in through the door
That makes three bats in my belfry
WONDERFUL!
(spoken) But wait, there's more ...

(goes on and on, 'till you fall out of your belfry)