Saw IV

Terrible, confusing, Saw IV relies on mixing characters and plot twists from the previous three films to make sense. Of course, I had forgotten each film promptly after watching, so I really couldn't remember who the hell was whom. And of course the end sets up yet another Saw. This series may be interminable. Clocking in at a merciful 1:35, it was bloody and relied on the 'genius' of all the inventive traps. Basically, invent the traps and try to fill in the convoluted plot afterwards.