The everyday poison known as toxic masculinity becomes dangerously easy to swallow in 'Linda Vista,' Tracy Letts's inspired, ruthless take on the classic midlife-crisis comedy. In the sunny opening scenes of this very funny, equally unsettling Steppenwolf Theater production - which opened on Thursday at the Hayes Theater - you'll probably feel like cozying up to that sheepish, disheveled big guy who rules the stage with his outspoken wit.