What has someone said to you that has, as they say, haunted you?
Tell the story of them saying it. Then compare the thing, the thing they said, to a concrete object -- a wall, a mirror, a skipping record -- and then have a relationship with that object. What object you choose to compare it to, how you describe the moment of telling and the object itself and its arrival communicates everything about how you feel about it all. Do you not want to forget it? Is it comforting? Frightening? Chastening? Wise? Does it fill in some goddamn blanks for you?