Ok, so celebrating the end of the year with a scenic boat trip might seen like a good idea on paper – the champagne! the views! the champagne! – but on water, not so much. This was particularly true in the disaster-prone 1970s when anything not fixed to the ground was destined to sink, burn, blow up or crash (or all four). Witness the SS Poseidon, a soon-to-be-decommissioned liner making speed across the Atlantic with a New Year's party in full swing when it comes out second best in a encounter with a monster tsunami. You'd count yourself unlucky to see in the New Year clambering through an upside-down ocean liner with Ernest Borgnine in tow, but, really, is it worth taking the chance?