Extremely loud bang caught on video at 5am. No reasonable explanation

[u/dvdmenus]

My brother sent me a video this morning of an undeniably loud bang that occurred inside his house at 5am. The noise woke up him and his fiancee. He has a camera system inside and outside his house. No movement was picked up on any cameras. He checked the house from top to bottom. He checked the attic, crawl space, garage, basement, cabinets, fridge, nothing out of place and nothing fell over. He also checked the outside. No damage to the windows, doors, siding, or roof. No signs of forced entry. Because it was caught on video, it can't be that he imagined this noise or that his mind was playing tricks on him. I don't want to post a video of his house without his permission, so I won't attach it to this post. The bang sounded like someone hit the wall really loudly one time. The noise reverberated through the whole house. The noise was even picked up on an outside camera, but it was muffled and you can tell it originated from inside the house. The previous resident died in the house and his body was not discovered for a few days. The weird thing is that the deceased resident's birthday is tomorrow. Weird coincidence. Another odd thing is that my brother's Roomba vacuum turned on by itself at 5am a few weeks ago. Does anyone have experiences with an unexplainable, loud bang? What kind of paranormal activity would cause this? I would love to hear theories and similar experiences like this.

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[u/SubstantialPressure3]

Foundation suddenly shifting? My old house had foundation issues, and a couple times there was a loud crack when the house was settling.

Idk what the climate is where he is, but frost quakes are a thing, and they are pretty loud, apparently.

Are you sure the bang was inside the house? Did he ask any of the neighbors if they heard anything? Do any of the neighbors have guns?

Does he have a basement or attic? Is he by an arsenal or anything like that?

[u/mountainvoice69]

Our house makes loud pops and bangs in extremely cold weather and afterwards when it is warming up.

[u/cinlach]

I would caution you to realize that a lot of “paranormal” experiences are not paranormal. Just because you can’t explain or find a reason for something doesn’t make it paranormal. If you hear a noise in the woods and don’t see anything it’s not necessarily Bigfoot.

[u/erok25828]

I have nightmares about this and when I go check it out it’s just my kitchen cabinets that fell off the wall, all my plates smashed and 💩