Ne Ne Ne Ne...

Ne Ne Ne Ne... is a one-star (★) challenge added in the Fallout: New Vegas add-on Gun Runners' Arsenal.

Challenge requirements
The player character must cripple five right arms with any shotgun (except the sturdy caravan shotgun).

Effects
Grants 250 XP upon completion.

Behind the scenes
This is a reference to the film RoboCop, in which Alex Murphy has his right arm shot off by Clarence Boddicker, who uttered a beeping noise (which sounded like 'ne ne ne ne') beforehand.

Не-не-не…