In other pet stories, I had my one guinea pig out (the braver-seeming one) and was holding her on my chest. She started to make her way to my shoulder, and I was like, "Aw, I know some pigs like to do that." Except then she tried to take off across the back of the couch, but I caught her! I thought she was being affectionate, but think she was actually just planning an escape route!