By Victoria Johns A spine-chilling horror flick has been dubbed the ‘most frightening ever’ by fans – but you may have never heard of it. Movie buffs have been naming and rating the opening scenes of horror films, in an attempt to agree on the most horrific. Films like Nightmare on Elm Street and Halloween usually take the top spots, but, now, a little known supernatural offering from 2002 has beaten them to it, with fans claiming it left them “traumatised”. Ghost Ship, starring The Good Wife’s Julianna Marguiles, opens with a dance floor full of people onboard the deck of a ship. The glamorou…