RC Goblin
The RC Goblin is a small remote controlled helicopter that can be used on a couple of missions in the Grand Theft Auto series of games. The helicopter was used for the missions Demolition Man in GTA Vice City and New Model Army in GTA San Andreas. It has no actual weapon attached to it but there is an electro-magnet attached to the bottom of the helicopter that can be used to transport objects from one place to another, like bombs. The name is a play on arse goblin, another sexual joke by Rockstar.
The only way to obtain this vehicle outside the missions is to use a trainer or modification to spawn the helicopter.