I reach a stage with anger/frustration/anxiety where I just want to scream. Not really possible as I live in a flat, but I almost scream internally and really tense my muscles up for a few seconds before relaxing and lying on the bed to calm down, sometimes in tears.
When it's not quite that bad, I do have the terrible habit of biting my nails, and I know it's not going to be a mind over matter thing, as you hardly even notice you're doing it?!?!