Dude, I thought I heard SAM too. But when he got off the chopper he said DAN! I think he is the dude from the 815 stuff, just hes the real actor. And he was crying because sonya was in the wreckage. Or maybe she is still on the island somewhere and he wants to find her. I think Dans a good guy though, it'll turn out good for him.
"That thing in the woods, It could be a monster, or just a really pissed of giraffe, I don't know" -Hurley