Apparently Bikes Grow On Walls

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Best ad campaign yet. (via Facebook)

We are used to seeing some of the better ad campaigns for Kenyon, remember “Thumbs Up”?  This one however seems to have escaped us.  Are they implying that we have magic walls? Are the bikes free?  Has Kenyon seen a meme before?  So many questions, so little explanation.  Let’s see if the commenters can figure out what the message is here.