UB_EXPLAINS on Instagram: "😨🧸 The Doll Behind the Wall! It started as a normal home renovation… until they opened one sealed wall and found something that should never be there. 👇 Behind the plaster, in a tiny dark space, sat an old ragged doll — perfectly upright, hands folded, as if it had been waiting. 😳 But the real shock? A note beside it. Written in shaky handwriting, it said: “Thank you for letting me out.” 😰 Some versions say the doll was placed there decades ago by the house’s prev