I loved that clip, WB!
So it's a serious scene. I've seen others that...reworked the shots of a few key scenes in Episode III to imply (disturbingly well) a much darker means by which Anakin 'earned' his Sith title. I'd try to get a link to it, but it's a bit inappropriate for this site. You'll have to search for it on your own time.
I guess this scene is right up there with Luke chatting with Biggs on Tatooine and Threepio tricking the snowtroopers into the Wampa pen.