"Buy some apples, or DIE." (Also comes with Apple Bloom Hive Hand.)
Replaces the grunts and growls of the Alien Grunts from Half Life Source (and GoldSRC Half Life, if you have GCFScape, recommend making a backup of the original file if you go that route though) with the voice of Applejack from My Little Pony : Friendship is Magic.
Also comes with Apple Bloom Hive Hand, replacing the buzzing of the Hivehand's thornets with the voice of Apple Bloom from My Little Pony : Friendship is Magic. Applies to both player owned and Alien Grunt owned Hive Hands.
^ Video demonstration for both