I've been seeing alot of chatter about the flares here but none of it is on what my first thoughts were... I thought the flare look VERY similar to the one that Sayid, Kate/Sawyer and Shannon set off in season 1 while trying to triangulate the singal for the transeiver. Did the others respond to those flares too? Did it cause the others to stir? Or did they just know what was up and blow it off.... It seemed to me the flares looked quite similar in the sky