I'm just FULLY shocked by this.

I suppose it's kinda possible Michael was captured by the others as he was approaching their installation, was DRUGGED by them [he DID say, when he woke up, that his head hurt] and given a proposition: We'll give you Walt, if you scratch off Anna [revenge for killing goodwin?] and let Henry go. Although I think chances are Anna was just in the way of what Michael had to do. Same with Libby. Can't leave witnesses. NOW Michael's going to fake like Henry shot everyone in the hatch and bailed.

Motive? I think there was either a proposition [mentioned above] or MAYBE [i'm leaning toward this idea] a revelation by Michael. He probably saw that the Hanso people are fully stocked and loaded for anything. They've got tech, guns, facilities, resources. Maybe he saw that the Hanso folk are just a bunch of perverse scientists that don't mind experimenting and hurting people who are "bad." They do what they can to seperate the "good" from the "bad," snatching Walt, snatching a bunch of tailies, attempting to snatch Locke. Even making a list that was alluded to early in the season. Maybe they showed Michael that Walt is fine and in good hands. Maybe even let 'em have a lil nappy headed reunion. With this the Hansos might have completely turned Michael away from those "bad" crash suvivors on the beach. And even if they didn't totally convince him, they'd still be his best bet. And we all know Michael doesn't care about anyone but himself and his boy. We'll get a Michael flashback soon detailing what happened while he was gone, ala Claire. Should be great.

I think we'll find out I'm right. Or on the right track. As for how it plays out exactly? I can never peg it. Ever. It's just good TV, guys.