The Tahoe 200, broken up into increasingly exhausted stages, provides a framework for the narrative of his earlier, traumatized life. It’s a promising approach, but Thompson is coy about the details of what happened to him, interspersed in a nonlinear fashion. Sometimes that’s his only choice, since his memory is imperfect. Other times it feels like a deliberate vagueness, meant to tease us until he gets over the next ridge.