Huhne's slopey shoulders

Having just got back to the UK after a break, I was amused to see that the Lib Dems are getting all cocky and go in for the "slopey shoulders" approach to policy they helped formulate in many ways. Thus I come to the rather odd banner image on Chris Huhne's website which has this picture of him.
Now, can somebody, anybody tell me what in the name of all that is Holy is going on with his shoulders or lack there of?