Years ago a friend of mine used to sing

'Our Tomcat swallowed a Kangaroo...'

to the tune of the 'Soldiers' Chorus' from Faust (Charles Gounod).

He never went any further than that one line, and I was wondering if anyone else had heard it, and if there were more words...

I am well aware of the original words - it's these silly words I'm after!

Sad, innit?!!