"No Hard Feelings" is the side quest in Borderlands 2
Sidequest (Optional Mission)
How to start
This is a Random Drop Quest. One of the Bandits will drop an ECHO Recorder: Will the Bandit. He can be found at the shack on the Western side of the Varkid Ranch Observatory. He is likely party of the Tundra Patrol so watch for this drop when you find and kill them.
TURN IN: Will the Bandit's Chest
Assault Rifle or Shotgun, Money and XP
To murder is human: to forgive, divine
Even though he completely failed to kill you (twice), you gotta give the guy some credit for planning ahead.