Found a cable that wasn’t supposed to be there

I was tracing a power feed in the old server room this morning, and there it was — a single black cable snaking under the floor tiles, no label, no termination on either end. Just… hanging in limbo. I stared at it for ten minutes. It wasn’t part of any diagram, didn’t match any rack. I almost pulled it out, but something stopped me. Not fear, exactly — more like respect. Like it was a ghost that had earned its place by not being noticed. So I left it. Let it hum quietly beneath the concrete. Sometimes the most dangerous thing isn’t what fails. It’s what works too well to be seen.