Of course, if you explained the lack of logic in Obi Wan jumping out of the window at the droid without a moment of thought, the Lucas apologist nerds over at theforce.net and starwars.com will just say that Obi Wan used the force to sense that jumping at the droid was the right thing to do, just like dropping down into the huge crowd of separatist droids was the right thing to do. Anytime there is a contradiction in the story Lucas just uses the force as an excuse to get out of it. In the OT, Luke/Han/Obi Wan/Leia and Chewbacca were kind of shooting from the hip through their adventures. But their logic seemed reasonable enough and we could suspend our disbelief because the acting and story telling was convincing enough. In the PT, there's no character study, we never really get a sense of who they are, Obi Wan and Anakin and Obi Wan are constantly contradicting each other. In the OT when there was a contradiction in characters, the other would mention it, like in ANH when HAn decides to stay after saying "bring it on, I prefer a straight fight instead of all this sneaking around." Then Luke acknowledges his contradiction when Han doesn't want to rescue Leia. It makes sense and we can go along with it. During the prequels your mind is constantly questioning the logic of everything going on.