Sanctum

Yes, James Cameron was involved with this movie... but he was a producer, he didn't write or direct!  It kinda seems low budget at first, because it's filled with Australians actors that I'd never seen before.  But the action started off quickly and kept me on the edge of my seat for the rest of the movie.  I'm telling you - it's intense!!  The acting is pretty terrible, and quite a few parts of the story were super cheesy.  But despite that, I enjoyed it because it was so exciting!  So CHECK IT OUT if you're looking for some excitement!