It was like that, but with light string style piggyback plugs on both ends. So the non-wall side could have been in the middle of a bunch of piggybacked plugs,

It was like that, but with light string style piggyback plugs on both ends. So the non-wall side could have been in the middle of a bunch of piggybacked plugs, but there would still be two exposed, energized prongs on whatever it was plugged into.