* Charlie and Hurley following around Jack: cracking me up.
* I like to think that, even in his delusional, sleep-deprived state, Jack could tell how *cra-zy* Locke is.
* Then again, I'm not sure Locke is crazy.
* Was that a cave next to the waterfall?
* Don't touch the evil doll in the water! What are you thinking!
* "OK, everyone needs to find jobs to do. And Sawyer, we're out of bodies to loot, so you need a new job."
[EDIT: I'm actively trying to avoid spoilers for upcoming episodes myself. There's a interesting minor detail I found online about one of the past episodes, it's in the comments below.]