text_a: yet another iteration of what 's become one of the movies ' creepiest conventions , in which the developmentally disabled are portrayed with almost supernatural powers to humble , teach and ultimately redeem their mentally `` superior '' friends , family ...
text_b: tully is in many ways the perfect festival film : a calm , self-assured portrait of small town regret , love , duty and friendship that appeals to the storytelling instincts of a slightly more literate filmgoing audience .