If its Halloween, it must be SAW. If you are still on board with the series (I bailed after III) here is the first teaser trailer for SAW V to get the blood pumping with a brief peek at one of what will surely be a great many nasty traps.
The plot revolves around Hoffman who is seemingly the last person alive to carry on the Jigsaw legacy. But when his secret is threatened, Hoffman must go on the hunt to eliminate all loose ends.
Just for kicks, here's the original teaser poster as well.