surface of the deep. samoan islands, thailand. two divers take off for a day of diving and a bit of fun in the sun. their dive spot is called east of the eden, but a hungry eel named emma turns this tropical paradise into a living hell. we want to warn you, what you are about to see is dangerous. don't attempt to duplicate this or any of the situations you're about to see. a giant moray eel mistakes diver matt butcher's thumb for a piece of sausage. >> when she first held onto my thumb, i didn't think it was too serious. i thought, okay, she'll let go in a second. and after a couple seconds, i realize, wow, i could have a big problem here. >> matt is out that day with his friend to see one of the most dramatic reefs in the world and to meet a moray eel known as emma. matt's a british ex-pat, who's been leading dive tours in thailand for a decade. he knows this territory like the back of his hand.