Psychoanalysis
Psychoanalysis is the belief that people would gain insight by making their subconscious thoughts conscious, therefore curing them. As a defense mechanism, I tend to shutout the people i'm close to when I'm really upset. I do this through putting my earbuds in and playing music over the noise of the rest of the room. Or just putting my head down and giving myself a moment to calm down. So I would put a picture of my playlist, to represent how I cope with being upset or overwhelmed.
Photo used under Creative Commons from Brett Jordan