There are quite a few of these on the site and not only that, Nick Thomas (genius!) has got together with London Transport Museum and is selling them as T Shirts. I think you can also send in other animals you've "seen" on the tube, so get cracking and you might find your drunken magic eye/magic mushroom induced staring coming back to you as a T Shirt. Sheer genius.
Cheers Ross. (Ross has also written a top article on the power of blogging which has gained me many brownie points at work - "I only blog for research and commerical reasons" - it's a great excuse!)