Bizarre new footage has emerged from Cleveland, Ohio, US, that shows a CCTV recording of one of these mysterious occurrences.
Residents say they have become accustomed to these activities but this one left many scared as pieces of their home started breaking.
Homeowners say the noises come from below the surface as floorboards shake – but no earthquakes or natural occurrences were reported at the time.
And so now the event has got conspiracy theorists speculating whether there is a secret government programme running underground.
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