The exorcist
After searching for a while he came back. John saw the black and white fur cat was playing with a mouse and it didn't let the mouse escape. He felt that he's trapped just like that mouse.
He didn't know how to open the door so he tried to push it. When John touched the door it started lifting up. John became scared and ran to the hiding place thinking that someone opened it from outside. But there was no one. John slowly walked out. That time a black smoke appeared in front of him. It said,