It's a photoshopped screencap, for a made-up story he posted a couple years back trying to be a tough guy about killing someone's dog. He received fist-discipline for his original thread and slunk away for a while.

Somebody better than me with the search, possibly JimB, can probably find his thread and his beat-down thread pretty easily.

Edit:

Bullshit thread: Bullshit

here's just one of the responses: response