Less than a year ago, we introduced time-boxed (2-hour) session based tests at ESO Solutions to reduce the number of defects escaping into production, to cross-train the quality assurance engineers as well as provide our support team (frontline support, sustaining engineering) a way to test new features prior to rollout to production. The format and execution of these sessions have evolved over time based on feedback from participants. They have become tremendously popular in the organization. This talk will go into details about the goals, motivation of these events - called bug bashes -, explain the lessons learned and both the expected and unexpected benefits. The presentation will describe how the bug bashes were setup, the specific roles, the rules that the participants followed as well as how the event was gamified. In addition to the positive impact on product quality, the talk will go into detail on non-technical gains as well such as bringing down organizational silos and creating an atmosphere that software test and development engineers and non-engineering staff enjoy and look forward to.