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: nohe 's documentary about the event is sympathetic without being gullible : he is n't blind to the silliness , but also captures moments of spontaneous creativity and authentic co-operative interaction .