Thirsty Grunt
From Halopedia, the Halo wiki
Summary
In the Halo: Combat Evolved level, The Maw, immediately after the bridge where you see Foehammer go down, go into the tunnel to your right. And enter the room to the right of that. You will see a lot of bodies, and one live SpecOps Grunt. He will sit there, trembling, until you approach. He will look up and say, "Good thing that food-nipple's waiting for me at the starship 'cause man, have I worked up a big grunty thirst!" (listen) He will say nothing else and will continue to sit there until you kill him unless you melee him. In this case, he'll scream "Oww!"
You can also run him over with the Warthog, and listen to him talk even when he's dead.
Note that he is the only SpecOps Grunt in Halo: Combat Evolved who carries a Plasma Pistol, as all others in the game carry Needlers and Fuel Rod Guns.
