Ghost

My cat Logan seems to be intrigued with the one bedroom. The room used to be my room. Then Leslie moved into the room.
Logan wanted to go into the room all the time. Especially, when Leslie was home. He would nuzzle the door. He always found a way to get in. Now that Leslie has moved out, he likes to hang out in there. There is nothing in the room. Just curtains and a receiver for a television.
He hangs out in the closet. He runs around the room and plays with nothing. I even saw him do a back flip in the middle of the room. It's hard to say what is going on in that little kitty brain of his.
Trying to think if there is a ghost child or a ghost parakeet. Logan is a strange little guy.