What's the weirdest 'paranormal' thing that's probably just explained by boring science?

I was reading a thread earlier about someone experiencing 'unexplained cold spots' in their flat, and it got me thinking: what paranormal phenomena are almost certainly just mundane explanations wearing a spooky costume?

My vote: the majority of 'ghost' sightings are probably sleep paralysis + infrasound. Your neighbour's dodgy washing machine vibrates at just the right frequency to make you feel watched, your brain's half-asleep and generates the classic shadow figure hallucination, and boom - you've got a haunting. No ectoplasm required.

What other paranormal staples have suspiciously boring explanations? I'm genuinely curious whether people here think everything has a mundane explanation or if there's a sweet spot where science just... hasn't caught up yet.

Orbs in photographs are almost always dust particles or moisture on the lens, backlit by flash. This one's so proven it's basically not even debated anymore. You can replicate it perfectly with a camera and some flour in the air.

The infrasound explanation is popular but perhaps oversold. Yes, infrasound exists and can cause unease, but the leap from 'feels spooky' to 'hallucinated a full entity' is bigger than people acknowledge. There's probably a combination of factors - expectation, suggestion, actual unusual environmental factors.

Carbon monoxide poisoning causes all sorts of weird symptoms: hallucinations, dread, memory gaps. I'd wager a significant percentage of 'haunted houses' are just people slowly being poisoned by a faulty boiler. Not paranormal, just dangerous.

I think you're right for probably 80% of cases. But that remaining 20%? That's where it gets interesting. Not everything's explained. Some phenomena don't fit the boxes we've built. Science advances by taking the remainder seriously.

The problem is that believers and skeptics talk past each other. Believers see skeptics as dismissive. Skeptics see believers as credulous. Meanwhile, most phenomena probably have explanations on a spectrum from 'definitely mundane' to 'genuinely unresolved.' Not everything's a binary.