Pain
Self-inflicted pain can have a very strong calming affect. When you are in a very stressful situation, where your body is already showing natural signs of panic, self-inflicted pain can help you regain complete control.
Situations where this could be very useful:
If you ever need to lie about something
If you ever find yourself panicking
If you ever need to really focus
If you ever feel like you're falling asleep when you shouldn't be
Like everything else, only use this in moderation or it can become a problem.
Load failed, please RETRY
Weekly Power Status
-- Power
Ranking 
-- Power
stone