During the ROTS Dooku duel, when Dooks sends Obi flying across the room and he crashes into the catwalk, Obi would have been hurt. BUT, to add insult to injury, when the catwalk falls down on Obi-Wan IT CLEARLY LANDS ON HIS PELVIS AND PUSHES HIM ABOUT 5 FEET ACROSS THE FLOOR! For someone who was nearly unconcious already (or even not) this would have not only pulverized his pelvis and legs but most likely severed the lower half of his body!
For those of you who have the ability to, go and re-watch this. Seriously now... c'mon. Obi was toast! But instead Anakin declares "He seems to be all right. No broken bones, breathing's all right." LOL... riiiight! PUH-lease!