This is an old 'traditional' Scout song, sung (yes) to the tune of 'Villikins & his Dinah'

As i was out walking with my Uncle Jim,
Somebody threw a tomato at him.
"Tomatoes don't hurt you", he said with a grin
"Only that one was 'specially wrapped in a tin".

The song 1 2 3 4.....4 3 2 1 etc. encompasses the above verse very nicely, and there are DOZENS more 'floating' humorous verses that also fit very well.   e.g.

"Jonah the Prophet was caught by a Whale
By whome he was swallowed or so goes the tale.
But then after three days and nights Jonah found
The truth that "You can't keep a good fellow down".

and F A R too many more !!