I know this will likely sound cliche, and for that I apologize in advance. A lot of times we sweat the small things to avoid seeing the things that really need adressing. That can be particularly true in people that have MI cause hell, we have enough to deal with. So we lash out at things like a glass of water spilling, or crappy retail merchandise. All we can really do is remember that things like that are replaceble, fixable, cleanable, and its really not worth getting overly frustrated over.