once again, something reminds me of mr. show. one of the sketches has a plane crash with only one survivor, and when they finally find the guy next to the wrecked plane, he weighs about 500 lbs, because he ate all the survivors. in fact, the reason why the plane went down in the first place is because he broke into the cabin and ate the pilots
I'm going to recommend ketsup, pepper, salsa, and salt, if you put enough of this them you should be able to choke'm down. Besides look around the plane for the people with thick glasses so you might can improvise a magnifying glass.
PS: watch the extras on the Castaway DVD so you'll know how to make a fire.