public static int FRONT = Config.BLOW_FRONT_RATE;
    public static int SIDE = Config.BLOW_SIDE_RATE;
    public static int BEHIND = Config.BLOW_BACK_RATE;

	@Override
	public void useSkill(L2Character activeChar, L2Skill skill, L2Object[] targets)
    {
            if(skill.getId() == 30)
            {
                    FRONT = Config.BLOW_BACK_RATE;
                    SIDE = Config.BLOW_BACK_RATE;
                    BEHIND = Config.BLOW_BACK_RATE;
            }



ΒΡΕΣ ΑΥΤΌ ΕΔΏ ΚΑΙ ΚΟΊΤΑ ΑΠΌ ΚΆΤΩ
			if (target.isAlikeDead())
				continue;

+			int _successChance = SIDE;
+
+			if (activeChar.isBehindTarget())
+				_successChance = BEHIND;
+			else if (activeChar.isInFrontOfTarget())
+				_successChance = FRONT;