I assume by the speed of it that he is still jet lagged, and wanted to get back to bed...!!! I always feel slightly (very slightly), for his opponents when they encounter him in this sort of mood.
Oh, I must be a horrible person lol. I love watching Andy thrashing opponents. One of my favourites is the semi's from Queen's last year, when Andy thrashed Roddick.
I love it when he plays like that because he seems to just relax and play.