Sayid: Someone has to [flip the switch] or we'll never leave this island.
Charlie: I'll do it. I'll swim down, turn off that bloody switch and swim back up. Piece of cake.
Jack: Charlie, you don't even know what we're talking about.
Charlie: I was junior swim champion in Northern England, I can hold my breath for four minutes; I know exactly what you're talking about, Jack.
Jack: No. And there's no reason to do this now. We're gonna focus on the Others. And then we'll deal with this.