Playing on the most primal of fears is a time-honored horror tradition. And Gore Verbinski’s A CURE FOR WELLNESS does just that. And then continues to do so for an unwarranted running time of around two-and-a-half hours. This hodge-podge of dental torture, putative madness, and a very clumsy use of eels as metaphor wears out its welcome well before the final credits roll, skittering at the end, and pell-mell at that, towards an ending that is painfully obvious and even more painfully trite.