Why is this happening?

Can anyone explain to me why I periodically get between 5-10 links per day from random Tigerhawk posts when there is no, zero, nada, nothing connecting to my blog on the referring page?  See this page, for example.  Not a hint of my presence there, yet I’ve already received 5 referring links from that page in the last 20 minutes.  All reasonably rational explanations will be gratefully accepted.