Martin McDonagh's notorious The Pillowman, about a writer of fables whose stories typically involve the sadistic murder of children, is a tough play to sell. The story, about the ways in which art informs our lives, focuses on a pair of brothers, one of them demented because he was tortured by his parents as a child. Listening to Michal recount that torture requires a performer both willing and able to play idiocy and rage with compassion and light humor. Travis Russell, who played Michal in Desert Stages Theatre's production, whipped in and out of dark comedy and frank tragedy with impressive ease.Equally striking this season was young Will Hightower's performance as an autistic teen in Actors Theatre's burnished production of Body Image in April. Hightower went for comedy in his depiction of a disabled youth without ever tipping over into caricature or disrespect for the troubled teenager he portrayed.