Brown's Smug Smile?

Gordon Brown is not a man renowned for smiling. So how does he manage a smug grin as he says the word "disappointing" in yesterday's speech about the Labour local election disaster? I watched it and thought it was wierd- take a look for yourself.

At about 20 seconds in he says "It's clear to me that this has been errrr {smug grin} a disappointing indeed a bad night for Labour"

Maybe I'm seeing things, but I noticed it the moment I saw it.