There are two groups of people who can never be succinct: conspiracy theorists and low-budget moviemakers. Seriously, there is no reason for this Blair Witch-on-a-boat nonsense to be nearly two hours long, but I'm a sucker for movies that take place in flooded/submerged towns (I actually paid to see Hard Rain, in the theaters), so here I am again, wading (heh) through another badly-made