Slap-Happy

Objective

 * Kill Old Slappy


 * Place Arm
 * Kill Old Slappy
 * Retrieve Arm
 * "Sir Hammerlock has hired you to kill the thresher who crippled him years ago. You'll have to lure the thresher, Old Slappy, out of hiding with something appetizing. Sir Hammerlock's arm oughtta do."

Strategy

 * The location where the arm is placed is in the middle of a body of water. The water here is very shallow and does not cause damage when walking through. After placing the arm, Old Slappy will rise out of the ground. Its tentacles can be shot off, as with other threshers. Aim for the blue orbs on its tenticles to do the most damage. This is key to surviving the battle, as shooting off a tentacle will award a second wind if you are in fight for your life.

Conclusion

 * "Old Slappy is dead. The mystery regarding who the hell named him Old Slappy, and why, remains unsolved."