I'm new to Precision Shooting and have already done almost all of these. I have participated in many more USPSA matches and am a CRO in them. We believe the go beep from the timer works the same as the mind eraser thing in Men in Black. One of the USPSA favorites where typically the time is on the shooter not a par time, IF!! you are finished unload and show clear, with a big emphasis on IF. The savvy ones know something is amiss