Ok so I couldn't get this out of my head and looked it up and it turns out the 'official' rhyme has it's own wikipedia page, but it's nothing like how I remember it? The official version is full of hippos and elephants and shit and she's a kid, it's really weird.

In the version I did at school, Mary Mac was an old lady and she lived in an old house, and I think it was her mother she pushed down the stairs?

This little snippet came back to me while I was doing the dishes- 'down the stairs, stairs stairs' and then something something 'crack, crack, crack, she broke her back, back, back'.

Man I wish I could remember it all, this would have been a fascinating addition to the folklore to record somewhere.

Hello operator, give me number 9,

And if you disconnect me, I think I'll lose my..