I almost had a keys issue minus the falling through the ceiling part. This past week we were running an ethernet cable in a drop ceiling. Had a ways to go and a lot of crap in the way so figured some weight on the cable would help, so I tied my keys to the end. I toss the first segment and seems to work fine. I move my ladder and the guy helping tosses it, and it goes right down the space between the hallway and a classroom. Luckily I tied them on good enough.