LOST Theories (will have spoliers)

[Jeritron]

Originally Posted by Shaggy The only think I can make of the Alternate Reality is.... Almost everyone who wanted off the island is being shown that their life was gonna be horrible if the plane never crashed... Only upside is the one man who didnt want off the island...Locke...is actually told by Jack that there might be a way to fix his spine for him to walk again.

How are they being shown this though? It's not like the versions of them who land safely in the alternate reality have the same consciousness as the versions of them who have experienced everything on the island in the original reality.
Unless deja vu and funny feelings turn into something more, there is no shared consciousness. That's the whole deal with it being an alternate reality. There's no connection there yet, so it's not like Jack's going to say "this suck I wish we still crashed."