QUOTE(john @ Dec 10 2004, 10:07 AM)
OK, well I have news for you... 40 people would not survive a plummet 10,000 feet in the air, paralyzed people don't all of a sudden start walking again after plane crashes, and polar bears sure as heck don't live on islands in the middle of nowhere! You have to throw logic and reason out the window on this show, just enjoy the ride...

You're right that most plane crashes don't have survivors, but there have been many plane crashes with survivors.
As for the paralysis, one can suspend disbelief because we don't know the original reason for the paralysis, part of it can be psychological.
Polar bears don't live on islands, but again, we can suspend disbelief because we don't know much about this mysterious island, and while we may think it's a polar bear, it can simply be a new type of bear that they discovered on this remote island.
But people that have been hanging around for who knows how long? Hmm, we can assume that they just missed him, but if that's the case they could have written a scene like that into the script. He'd still get away, as Jack would opt to save a life.
Or they could have brought him back with some brain damage, slurred speech, etc. something. Now it'll be more like watching Alias or Smallville.