As a haunted house sleep tester, I've seen all kinds of strange phenomena.
When receiving a new villa order, the owner specifically warned: "No matter what noise you hear, don't look under the bed."
On the first night, I was awakened by the sound of scratching a wooden board. I shined my flashlight on the source of the sound - a pale hand slowly stretched out from the bottom of the bed.
I immediately took a photo and sent it to the owner: "Is this a special effect you designed?"
The phone suddenly vibrated, and the owner replied: "We have never installed any mechanism under the bed."
Almost immediately, the hand suddenly grabbed my ankle.