The memory is just a vision of a hand pressed against the wall.
You feel things from the wall. Not just the paint and how dry it is, or how cool. You also feel emotions coming off of it, and to you it's a sense just like touch or smell or taste. You just know that somebody on the other side is fighting. They fight a lot. It always comes through the wall. It comes through the wall so much that you can feel it even when you're not touching it.
So close, you can feel fear and anger, too. Probably from one or the other, but maybe both. You can't tell.