Hearing Voices

 is a Fallout 3 quest that is added to the game with the Point Lookout add-on.

Walkthrough
To start this strange quest go to the Ark & Dove Cathedral, talk to the intercom beside the gate and then follow your tick mark to your location. On the way you will have to fight a plethora of swampfolk, ghouls, and the occassional smuggler. This might be a good oppurtunity to find the tracker shack, which is off the beaten path. Once you get to your location, rest on the bed and raid the local first aid box. Now it's time to go in the door. In this cave the only loot will be in a few axes. Once you pass all this it's time for the challenging part, enter the grove. In the grove you will fight at least ten mirelurks and maybe two swamplurks. When you finally get to the mother load of all punga fruit, you will have the option to get the seeds, to advance the quest you must. Once you get the seeds, the plant will belch a cloud of gases causing you to hallucinate (you'll see huge bobbleheads, hear ghouls that aren't there, and watch as huge nuca-cola quantums erupt into a mini nuclear explosion). The most alarming hallucination will be in a sighting of Mister Break aka Mister Burke and right beside him will be a nuclear bomb similar to the one found in megaton. Upon trying to speak with Mister Burke/Break, the bomb he should be leaning on will explode ending your hallucination but continuing the confusion. All your questions will be answered in the near future, don't worry. Just head over to the cathedral to end this screwed up quest.

Reward
Punga Power acheivement, SCAR hair style*, 300 XP, and access to the Ark & Dove Cathedral(with access to all the punga fruit you need)

* note that once you talk to Nadine about removing the SCAR hair style, you decision is FINAL, unless you save your game right before you remove it you cannot get the style back.