I dunno, this would need a lot more work to be anything like good, but I must get back to doing things productive, so here's one to the tune of the Pace-Egging Song:

The Roller-Coasting Song

Here's 1-0-2 jolly folk totally bare
We have come roller-coasting way up in the air
Way up in the air and then down with a wheeee!
And it's all in support of a good charity.

Well the first to get on it is Mrs. McGrath
All the way from the seashore she clears us a path.
With her large heaving bosom and strapping behind
She occupies all of the first car in line.

Well the next to get on it is John Barleycorn
He's as green and unhusked as the day he was born
If he scatters his seed as he rides up and down
Next year there'll be barley grown over the town

Well three men from Kent are the next to get in
Merry merry they seem in their cups and their skin
First they're merry up there and then merry down here
But who knows where they'll go to be merry next year?

Oh the next to get on is the Miller of Dee
No one cares for him and for no one cares he.
At the sight of his bum so enormous in size,
The town ladies sing "a bad moon's on the rise!"

Well the last to get on is old Mrs Ravoon,
We can see too much of her, both late and soon.
We can see too much of her, yes too much by far
Although she's been put in the very last car!

Here's 1-0-2 jolly folk totally bare
We have come roller-coasting way up in the air
Way up in the air and then down with a shriek!
And we won't stop coasting 'til sometime next week.