I once almost got injured by the Carolina rigging of dive boats in North Carolina wrecks. I was last coming back up the anchor line when the weights for the safety stop line came crashing down fast on the anchor line. The reason was someone wasn’t using proper buoyancy and had floated the safety stop line up toward the surface and when they let go of safety line the weights came crashing down toward me, luckily I removed my hand in time from the anchor line.