"Note for Self-Person" is the side quest in Borderlands 2
Sidequest (Optional Mission)
How to start
Complete Bright Lights, Flying City and The Cold Shoulder. Go into The Fridge and favor the left-hand side of the Frigid Cleft as you head toward Icemaw Grotto. A Goliath should spawn on that side and drop the recorder needed for this mission. You kill him without Enraging him! He will then drop: VOICE BOX THAT MAKE WORD COME OUT, allowing you to begin the mission.
TURN IN: Weapons Cache
Roaster, Money & XP
Every once in a while, a Goliath gets a good idea.
You found Crank's weapon cache, or to describe it as Crank might, "you find gun bang weapon box for having to get the reward."