James Cameron's** Sanctum** has been floating around for a while - since 2006, to be exact - what with the little matter of **Avatar **to attend to, but it's finally spashing down and Universal have unleashed a couple of new clips to whet your appetite.
**Sanctum **is loosely based on the experiences of Aussie subsea explorer Andrew Wight, who found himself trapped in an underwater cave network by flash flooding back in 1988. He survived the ordeal to co-write the script, which sees master diver Frank McGuire (Richard Roxburgh) step into his flippers as the head of an expedition to explore the South Pacific's Esa-ala Caves.
As you can see from the second of the breathless snippets, things quickly go awry in a serious way when a tropical storm hits.
McGuire and his fellow divers - 17-year-old son Josh (Rhys Wakefield), Carl Hurley (Ioan Gruffudd) and 'Crazy' George (Dan Wyllie), among them - are forced to find an alternative exit as the oxygen runs out.
Sanctum is out in 3D on February 4.