My local range has an instructor who offers advanced training, and, in celebrating being fully vaccinated, I signed up. The class focused on the psychological/physiological effects of CQB, as well as an introduction to how to enter rooms/ turn corners, and handle doors. The course culminated in several scenarios where I was in a shoot house, armed with a Glock loaded up with simunitions, and people designated to play the roles of hostages, bystanders, and, of course, hostiles. All in all, it was fantastic, and I learned a lot. The psychological/physiological bit I mostly knew from experience and my civilian career field, but the room clearing stuff he taught me blew my mind, and the scenarios forced me to try things I hadn't before (e.g. one-handed use of a pistol while simultaneously using my flashlight... I need more practice with both). All in all, it was a great experience, I intend to do the instructor's Israeli CQB pistol course next!