1. Locke is increasingly proving himself to be the Gilligan of the Island.
2. Communication is very important when three people are securing a very small farmhouse. If two of them find massive amounts of high-powered explosives in the basement, they should find an appropriate time to inform the third person as soon as possible, even if intervening events must be given center stage.
3. Sun doesn't seem to be affected at all by the fact that she killed someone a few days ago. It's not everyone who can go so quickly from shooting a woman in self-defense to finding creative ways to mess with people in the context of an all-or-nothing ping pong match. That woman is a cold-blooded killa, straight up.