not saying that's what was on your film or no disrespect if your taking the piss but those balls of light are known as orbs I have various photos of them in different places where I've taken photos over the years not knowing they are there until you see the pic. My mum had a photo of her mother and father on their wedding day sitting on her coffee table the last time i went over there I picked it up and had a look at it and noticed faintly in the background there was a man and lady behind them you could barley see it and no one had noticed it before until i pointed it out. It turns out its her mothers mother and father who were already dead took my mum by surprise as she's a Christian lady and doesn't believe in than kind of stuff but had no way of explaining that one
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