@Goal@; Make a self-control roll whenever it would be wise to deviate from your goal. If you fail, you continue to pursue your Obsession, regardless of the consequences.
Make a self-control roll whenever you face a life-threatening situation: piloting a burning vehicle, staring down an entire street gang while armed only with a toothbrush, etc. If you fail, you may not back down from the challenge – but you may roll again after every success roll or reaction roll relating to the situation. In combat, make a self-control roll every time you take your turn. If you fail, you must make an All-Out attack or engage in some other kind of near-insane, suicidal behavior.