Inside the ship, Kate immediately starts trying to pry open the case with a pickaxe, for god's sake. She's stopped by Jack, who says they should take the box out in the open before they try to violently open the box of dangerous explosives. Kate tries to take the box, but Jack all manly is all "I got it."
Outside, Arse is still going on about the little Lost clique. And I'm sorry, I find it a lot more believable to assume that there is lots of interaction with the other lostaways, just that most of it happens off camera. I find that a lot more plausible than Arse's claim that Jin never brings fish for anyone else. Arse might want to consider that the other teachers didn't want him sitting with them in the cafeteria not because of their own little cliques but because he's an annoying windbag. Of all the nagging problems with this show that could be addressed in a meta-rant like this, this is the one J.J. goes after? Oh, and this one too: "And some of us have actually lost weight while we're here. Now, you mind telling me where you're hiding the carbs?" And fortunately Arse stops mid-spaz to freak out at Jack and Locke carrying the dynamite out. Well, you wouldn't go in with them, what did you think they were going to do? He makes Locke and Jack put the box down gently, and has them step away from it. As he crouches by the crate, he asks if any of them know what happens to dynamite in ninety-plus degree heat. "It sweats nitroglycerin," he says, gently prying the lid from the box, and lifting it off. Jack comes forward, earning a quick rebuke from Arse. Jack steps back.
We get a little science lesson from Arse, who explains that dynamite is nitroglycerin stabilized by clay. He lifts out a stick, covered in crusty white stuff. He says it's the most dangerous and unstable explosive known to man, not to mention a handy boost on just about any car-racing videogame ever. He asks Kate for her shirt, which he needs to wrap the dynamite (not gratuitous cheesecake potential, although Kate is wearing a tank top; it seems to be because she's the only one wearing more than one layer). She obliges, and he soaks the shirt in muddy water as he lectures on about the man who invented nitroglycerin, who none of them have heard of because "he blew his frigging face off." Well, that could happen to anyone, Arse, who I can't believe isn't wearing a redshirt (and I can't believe I didn't peg him as a redshirt ages ago). He gingerly wraps the dynamite and continues the story about the inventor's assistant coming in to find his mentor detonated, and said, "I guess this stuff does work."