This is different in format to the Reader's Digest caption contest (which I am in this month) as readers simply add their captions to the comments underneath the cartoon, then the site picks the best one. The prize is a copy of Avatar and a Sony Blu-ray DVD player.
It's interesting to see the captions come in (they're just over 300 at the time of writing) though it's fair to say they're a mixed bag. Also, This is Money is a Daily Mail website so many are from, er, a certain political perspective.
Click here to see the competition