An old woman spinning takes on a calf and, in a string of quick, odd little steps, ends up throwing it by the tail over a wall. The whole thing is deliberately absurd and over in seconds, closer to nonsense than to anything that happened.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
There was an old woman sat spinning,
And that's the first beginning;
She had a calf,
And that's half;
She took it by the tail,
And threw it over the wall,
And that's all!
About this rhyme
A little nonsense tale in miniature: an old woman spinning, a calf, a tail thrown over a wall, and then it simply stops. The ending is the whole joke, so let the last line land flat and sudden rather than sing song. It works well as the closing rhyme of a session, since it says so itself.
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition