Crazy, Crazy, Crazy

 is a quest in Fallout: New Vegas.

Quick walkthrough
Find Neil at Neil's Shack and he will give you a mission. You will continue your way up the hill and exterminate the Super Mutant Masters and Nightkin. Once you arrive at the broadcast building, go out the back door pick up the key under the stairs. At this point you have two choices; kill Tabitha or repair Rhonda, the custom Mr. Gutsy, in the storage building.

Detailed walkthrough
As you appproach the Neil's Shack A super mutant named Neil approaches you and starts automatically a conversation dialogue.

He will inform you that an another Super-Mutant named Tabitha, has taken over the Black Mountain under her rules ( see the section Extra Details for female gender of Super Mutants ) and one of the rules which is clear to all of them, is, that none Human is welcome to the area.

At the same point you will automatically obtain the quest Crazy, Crazy, Crazy which requires from you to enter the Tabitha's room and eliminate her chaos.

He will also let you know that the area is patroled from Super-Mutants at the daytime while at the night, Nightkin patrols the roads while they are stealthed.

With a Speech-Check of 50 you can convince Neil to assist you in the killing of Tabitha.

If Speech-Check is succeful, Neil will reply that if you're able to reach the village at the north of the mountain he will consider if you are worthy at his eyes and he will decide from there if you're good enough of having chances against Tabisha ( This information is irrelevant,since there's not factor included,neither temporary companion, only dialogue options )

From the Neil's Shack you'll have to make your way up at the road that leads to the mountain, by fighting against 3 Patrols of Super-Mutants. On your way up, you'll find a body of an NCR Trooper. If you pay closely attention you'll see Bear-Traps exactly at legs of the corpse, and all the way up to that Hill. Be careful to avoid Bear-Traps and falling rocks if you choose to take this path.

If you choose to avoid this short-cut and take the normal path, the 3rd Patrol of Super-Mutants will include also 1 Nightkin.

Once you reach the summit you actually have 2 options here. You can either talk to Neil and he will help you by misleading the guards at the entrance of the main buildings which requires from you and your companions to become stealth ( since you choose to avoid fighting with them ).

Extra Info : If you choose the part where you get assisted from Neil, while Neil is coming back from giving false information about "an intruder in the entrance of the Black Mountains" after that,he will start walking towards back to his previous location, BUT , he will not be alone , since Stealthed-Nighkins will be exactly behind him and at his side while they are heading back to the entrance of the area. Bugs-Section : Please check the Bugs-Sections of this Quest, since in this Quest you'll have to face at least 1 of 4 bugs.

The second choice you have, is a ham-transmiter which is located at the destroyed building just across Neil's Position. You have 3 dialogue options, one of them , which includes 70 Speech Skill. The first option, saying you're a big fan of the Super-Mutants will send the remaining alive Super-Mutants of the area towards your location. The Second option, which requires the Speech Skill of 70 points, will actually do the same thing that Neil's assist does.. to send the remaining alive Super-Mutants and Nightkins at the entrance of Black-Mountain, leaving Tabitha alone and the Third Option, will do nothing and it's there only for those who changed their mind.

NOTE: If you continue past Neil, it is possible for a Glitch to occur where Neil will not be able to join you regardless of the speech options, always replying "OK. But make it quick."

Once you cleared the whole area from the top of Black Mountain you'll see a building at the left side of the area, which is a storage shed and inside the storare shed you can find Tabitha's robot named Rhonda. GOOD KARMA CHOICE : If you decide to repair Rhonda, which requires a Science Skill of 60 points, you will "activate" the good ending of this Quest , which is ... the moment you decide to leave from the warehouse, Tabisha will spawn outside of the storage-shed and will be happy to see her Robot repaired and fully functional again and she will decide NOT to attack you ( as she's remains friendly ) and you will instantly finish the Quest , and receiving Good Karma as well.

The Second choice to finish this Quest, is to enter the room where Tabitha is inside ,and just kill her. NO KARMA PENALNTY To do so, you need first to enter the room which is located at your map or at your compass. If you have Science Skill of Easy difficulty ( 25 points ) you need to hack Tabitha's Personal computer ( don't search for a named-terminal, it doesn't have any special name, just simple Terminal ). The last entry in this terminal says that Tabitha herself hiding a second-key of her personal room ( the one you need to go and kill her ) below of the stairs leading to her room.

Bugs
Neil the super mutant will tell you to meet him at the top of the hill. He will be located to your left right after you pass the crater (radiation warning). Talk to him when you see him and don't go running ahead. If you go past him and start killing the Nightkin, he will not help you complete the mission, he will be stuck in the same conversation. If this happens to you, you can still complete the quest. (confirmed Xbox 360)

In some situations, Neil won't spawn at all. Confirmed on PC.