It's a vacation nightmare as a passenger falls 15 stories off a cruise ship balcony into the pitch black sea. Fellow passengers could hear the woman screaming. Witnesses say she was taking a selfie during rough seas when she plunged overboard. The ship came to a halt and a rescue boat was sent out. By some miracle, she was found alive. Sarah Kirby is one of the few people in the world who knows what it's like to fall off a cruise ship and live to tell about it.