All I know is that Jack made a BIGGG mistake!!! I guarantee it, it just seems, Jack's character has changed drastically from the season 1 hero, we remember. I don't know if he just can't wait to get home or what, but I think hes had enough. And he makes a huge mistake getting off the island with out the rest of the gang, I just hope Locke doesn't make the same mistake, personally I think he stays. But a bad decision was made a BAD one!
"That thing in the woods, It could be a monster, or just a really pissed of giraffe, I don't know" -Hurley