In the last 2 matches, a call was questioned on engaging knock down shotgun targets. The scenario as follows: there are 4 shotgun knock down targets on the stage. The shooter misses the first target, knocks it down with his second shot. Reloads and knocks down the 2rd & 3rd target and in doing so, the vibration on the target stand lets the 4th target fall. The scenario states that the shooter must take all 4 targets down and can re-engage any missed targets. The question comes up that all 4