I had a vision for installing a floor to ceiling mirror at the far wall of my arcade game room. Had it professionally installed. Literally makes the room look twice as long. The room is 40′ long, currently with 14 pins along the wall.
I also installed LED lights along the top, which run along the 3 other walls and are mirrored, creating the super long room effect.
Even when you are standing in the room, knowing you are looking at a mirror, it still confuses you.