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There's no techie trickery here, nor is someone at Google playing a prank. It seems that all you have to do is come up with a page that lots of people find sufficiently funny to link to from their sites
A small piece about the recent I'm feeling lucky "exploits".
http://www.newscientist.com [newscientist.com]
A noindex, follow tag on the linking page can ensure it doesn't outrank the proper page.
Disclaimer- This is untested and the worst case scenario may just be that it works.