The night my kit caught something, and what it actually turned out to be
One night, at a place I won't name, my recorder picked up something that had my pulse going. Here's what the rest of the kit actually showed once I checked it properly.
Right, so here’s a night that actually tells you something, rather than me just listing what’s in the bag. I was in an old building I won’t name, the kind with thick walls and a reputation nobody local can quite pin down, recorder running on the desk, torch and camera set up on the tripod in the corridor outside my room. Just gone two in the morning, the recorder picked up a thud. Not a creak, not a settle. A proper thud, loud enough that I sat up straight and nearly knocked my tea over.
What the recorder actually caught
A recorder tells you one thing honestly: a sound was there. It doesn’t tell you what made it, and it definitely doesn’t tell you where it came from, because sound bounces round an old corridor in ways your ear doesn’t expect. My first job, always, is ruling out the ordinary before I get excited about anything. So I went back over the footage from the camera on the tripod in that corridor, the same minute, timestamped against the recorder. Nothing moved. No shadow, no draught lifting the curtain at the far end, nobody walking. Whatever made that thud, it wasn’t anything crossing in front of the camera.
That’s the whole point of keeping the camera steady rather than holding it. A shaky clip from a nervous hand will give you movement that isn’t actually there, which is how half the “shape in the corridor” clips online get made. A fixed camera just shows you the room as it was, which in this case was empty and still. While I was reviewing it I also went back with the torch to check the corner where the shadow fell, because a trick of the light is behind more “figures” than anything else in this job. It was a water stain on the plaster. It had been there the whole time.
Ruling out the ordinary explanations
Right, so if nothing moved, what makes a thud like that in an old building at two in the morning? Pipework is the obvious one. Old cast iron pipes contract as they cool, and they don’t do it smoothly, they do it in sudden small movements that can sound exactly like something being dropped two rooms away. Floorboards do something similar once the temperature drops and the building settles for the night. I’ve chased that exact sound before and found nothing more exciting than a radiator.
This is where the logger earns its place in the bag. Mine’s a small unit that tracks temperature and humidity continuously through the night, rather than me walking round with a handheld thermometer taking the odd reading whenever I remember. I pulled the log for that corridor afterwards and there it was: a clear temperature drop starting at 1:58am, four minutes before the thud. Not a sudden icy blast, nothing dramatic, just the sort of drop you get when old heating switches off for the night and the pipes start cooling as the water inside them cools with it. I’d left it logging for three nights running by that point, and the drop showed up at almost the same time each night. That’s not a one-off. That’s a boiler timer.
The bit where I nearly missed the whole thing
Here’s the part I’m not proud of. My recorder’s battery light had been flashing amber for twenty minutes before the thud happened, because I’d packed spare batteries for the camera and, as usual, completely forgot the recorder needs its own. If it had died five minutes earlier, I’d have had a camera showing an empty, silent corridor and no sound at all to explain it. That’s the real danger with this kit. It’s not that it lies to you. It’s that a gap in the recording looks exactly like nothing happened, when actually you’ve just lost the bit that would have explained it.
So that thud, in the end, had a logger reading, a timestamp, and cooling pipework that lined up with it almost to the minute, three nights running. That’s not nothing, but it’s not a ghost either. It’s a cold building doing what cold buildings do, caught by kit that happened to still be running, and a recorder that very nearly wasn’t.
What could it be, or is it a ghost? You decide.
More when I have it.