Jack was in a mood to have his belly rubbed and was being awful cute. The flash wasn't doing him justice so I turned it off and everything ended up a little blurry. It reminded me that Jack is a Nebelung... and where the name came from. From Wiki:
The name Nebelung — apparently a portmanteau of the German word (Nebel) for Mist or Fog and a medieval Germanic saga, Nibelungenlied — is perhaps derived from the cat's distinctive silky blue-grey coat and from the breed's progenitors, who were named after the two major figures in the Nibelungenlied, the German warrior Siegfried and the Icelandic queen Brunhilde.