From my Memes In Real Life project.
More info on this piece here
update: seeing an epic number of page views today, I'm happy other people find this as entertaining as I did. Tomorrow morning I will post down loadable pdfs. There is also a Digg page for it, so Digg it if you like.
update #2: I've uploaded down loadable files of my MIRL fliers. Grab
them from below, print them out at your printer at work, steal some
tape, and put 'em up IRL.
Missing Invisible Bicycle (hand drawn version)
Missing Invisible Bicycle (plain version)