Another version:

One man went to mow,
Went to mow a meadow,

Chorus:
One man and his pet Pomeranian poodle pup, Spot
A bottle of pop,
Sausage roll,
Old Mother Riley and her cow,
Big bass drum,
Bottle of rum.
Gallon of gin
And old dustbin
Went to mow a meadow.

Then progressively increase the number of men and count down as usual but gradually speed up the chorus. When it is ten men slow verse and first part of chorus right down but speed up the chorus until it is almost (but not quite) unintelligible, but sing the last 'Went to mow a meadow' very slowly.