The document provides a quick start guide to guerrilla usability testing. It discusses preparing for a guerrilla testing session by selecting a venue where the target audience can be found and ensuring internet access and minimal distractions. Each 10-15 minute testing session involves introducing yourself, gaining consent, asking contextual questions, providing scenarios for participants to complete tasks, and evaluating usability. The guide stresses making participants comfortable, focusing on scenario-based tasks, and letting participants identify their own successes and next steps.