In “Feux Follet,” an old man’s grief attracts supernatural lights in the dark Louisiana swamps. An exploding transformer’s unnerving energy in the title story matches the ferocious temper of an unlucky hustler. “Blackout” sets the profound numbness of a man abused by his unstable partner beside the beauty of an unexpected moment of joy with someone else. The teenage narrator in “Before Las Blancas” is so overwhelmed by his sexuality that he abandons everything and everyone he’s known to live in a happy illusion in Mexico. And “Where It Takes Us” is a poignant snapshot of a gay man who accompanies his straight, HIV-positive brother to the racetrack to bond again.