Each of the 4 characters has an special ability, you firstly need to reach level 5 to earn your first skill point at which time you can press
and use the bumpers to scroll to the skills menu and spend your skill point on the top skill.
Now you will have the ability to use your character's ability, in this case Brick's ability is 'Berserk' in which once you press
Brick will go Berserk, which gives him very fast health regeneration and high damage resistance. While Berserk is active, Brick may not fire his weapons; instead he punches his enemies so be close when you active.
Each punch should kill the early low level Skags around Arid Badlands.
All skills have a recharge time once they are used