I'm surprised they didn't explain what it was on HIGNFY - it was actually the first time I've seen it (ahem) enlarged and even on TV it looked pretty sus. In the full res version it's obvious it's a paper bag but I reckon even seeing it on the shelf from a distance you would do a double take!

I'll have to search it out next time I'm in town and have a chortle.

edit - some interesting linkage:

http://www.manchesteronline.co.uk/news/stories/Detail_LinkStory=73550.html
http://www.timesonline.co.uk/article/0,,630-909726,00.html

Gareth