Corridor Picture Banging This is the footage taken from the corridor at the rear of the Regimental Room. The voice recorder was set on auto-sound activation, which means that it would only start to record when it registered voices or sounds nearby. The initial segment is of me setting up the device and closing the door behind me. At 14 seconds you can hear the recorder cut out, and then begin again, to continuously record up until exactly 2 minutes (106 seconds) revealing a clear, repetitive but equally random knocking sound. You can also hear faint noises of the investigation team in the Regimental Room. We later managed to replicate this by pulling a nearby picture frame away from the wall by roughly an inch and then letting it knock back again. We are as yet unable to explain how the picture managed to knock itself against the wall for this period of time. Click Here to Download