This is another tutorial within the story after you complete Act 1. After completing this tutorial, you will be able to curve your bullets at the cost of one "adrenaline bullet". To initiate the bullet curve, press and hold
and move the
until the curve and enemy are white. Release the
and you will fire.
The Fire Eaters (dual pistols you acquire about halfway through the story) use two "adrenaline bullets" for the Shrapnel Storm
bullet curve, which is different than the regular bullet curve. The SS bullet curve will use five bullets from your magazine to create an "explosive" attack against your enemies. The steps on how to execute the SS bullet curve are the same as normal.