Your challenge here is to inject a story into the comment space of a product a web site such as Amazon or ebay much in the vein of the Three Wolf Moon t-shirt on Amazon (see the back story). More examples include the BIC for Her pen reviews or the Diamond Braided HDMI Cable

Find an item that is ordinary and has not been given this treatment by anyone else. The point is to see if a comment can carry the essence of a story and if others will feed into it. Now when you do this, do not be a jerk, the comment needs to be subtle, ironic, but have a real feel to it, and really be added to the original site (not marked up as a copy web page). Include a link to the product, what you added, and describe how it acts as a story embedded into another web site.