I think this is the best place to post this...

After Locke shoves Patchy through or into the fence surrounding the barracks
he says “SORRY”
What if he meant sorry that he felt he had to kill Patchy not that it did kill him…
It would be worth a try if he knows personal things about him (Locke) that he doesn’t want other losties to know…

__________________
Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.