Reply #9: WARNING! SPOILER!

[RoBear]

Flashback to Locke at the office where the Walkabout is to take place. They won't let him go. He says he's able to do it, but when he turns it develops he's in a wheelchair. So the wheelchair we've seen a couple of times was his, and somehow the crash returned his ability to walk. (Did you see the shot of him wiggling his toe and looking puzzled?) Don't know how this squares with medical science, but it was a great WOW moment for me. Also, I don't know if you saw it but apparently Locke was face-to-face with the "whatever-it-is" and everybody thinks he's dead, but he turns up with a boar he killed, so it appears he will be one of the ones who keeps them alive.