if you're doing Bench Press, without a spotter, make sure the weights are not fixed with a stopper.
So in case of total failure of reps, just hold the bar at you chest, twist to 1 side so the weights will drop out, then try to control the motion as it swings violently to e other side, and the weights will fall out too.
U need not be concerned with the weights hitting the ground loudly, as there wouldn't be anyone else around. (if not, they should have come to your rescue, unless u're a really replusive person)