...Or Are You Just Happy to See Me?

...Or Are You Just Happy to See Me? is a challenge in Fallout: New Vegas.

Requirements

 * The player has to kill 25 characters by planting live explosives (grenades, mines, or C-4 explosive charges) onto non-player characters.
 * This challenge can be easily achieved in friendly locations (Crimson Caravan Company or Camp McCarran) with plenty of NPCs wandering about. As long as the player remains in stealth mode and isn't detected, each kill will count as a stealth kill, meaning no infamy will be gained nor will the characters turn hostile against the player.
 * Note that without Silent Running or ducking behind cover the player can be caught in the blast radius.

Effects

 * Player gains 50 experience points

Behind the scenes

 * The name is a play on Mae West's famous quote "Is that a pistol in your pocket, or are you just glad to see me?"