Lets write a Limerick, one line at a time.

[Scrumpy]

Barry stood in a queue. He didn't know what for

[klondike]

Barry stood in a queue. He didn't know what for
It must be for something good it stretched right out the door

[Mups]

Barry stood in a queue. He didn't know what for
It must be for something good it stretched right out the door 
He waited and waited, and his feet were getting cold

[Ruthio]

Barry stood in a queue. He didn't know what for
It must be for something good it stretched right out the door 
He waited and waited, and his feet were getting cold
And his sandwich was growing mould

[GrannyMac]

Barry stood in a queue. He didn't know what for
It must be for something good it stretched right out the door
He waited and waited, and his feet were getting cold
And his sandwich was growing mould
When his turn came, he said 'just give me four!

                     ************
Mups started this, but it was overlooked:

When Arthur met Sally he said
What on earth have you got on your head?

[Scrumpy]

Oh!!!  Mups , I am so sorry. I never saw your starter...

[Ruthio]

When Arthur met Sally he said
What on earth have you got on your head?
It sparkled and shone

[Scrumpy]

When Arthur met Sally he said
What on earth have you got on your head?
It sparkled and shone
And was four inches long