Two astronauts urgently seek/
The source of a cooling pump leak/
Unless they replace/
A part out in space/
The mission is right up the creek.
About twitmericks
There is an old fellow called Mick/Who's been penning the odd limerick/I admit he's no Keats/But he does them in tweets/So to follow, you just have to click. https://twitter.com/#!/twitmericks
"The limerick master of the twitterati" (The Guardian).