Naturally now with Season 2 on DVD I am pausing everything to double check...having recently rewatched this episode, the main question on my mind is the shark. Others within the forum have mentioned this shark...however, I think the most interesting thing is not only the Darma mark on the fin...but the mark is that of the Arrow...the Darma hatch the the tail end hides in their first days on the island. Could this be where animal testing was done on the island?