How did that rook get out of the corner and why is it in the center.

Note how the other rook is right next to the king, and also the one knight that thinks it's a bishop on Ao's side.

Theres a pawn on h1 as well...

Don't forget the Pawn conga line in front of the white Rook.

Y'all just too rookie to understand Ao-kun's strategic genius