Beautiful snake and enclosure too! How much did the enclosure cost you and how big is it?
Does this behavior stop for a while after feeding? Mine does this thing that I believe is hunting. I don't know if he does it when I'm not around but he generally starts up nearing feeding day. In the evening, and in my full view, he very slowly cruises the cage taking all different routes, stopping now and again to just stare. Other than that he phones it in for at least 3 days after feeding.