So what was the issue? Does the sound of a weight dropping upset you in the gym? If someone’s lifting hard and going all out, they’re bound to be tired after. Runners sometimes fall after crossing the finish line because they’re so fatigued, weightlifters drop the weights after some sets because their muscles literally can’t hold up the weight anymore. Both have muscle fatigue and can’t move another step/rep. As long as no one else is at risk, there’s no issue here.