I've always liked the effect of having somebody in there who hadn't the faintest idea what was going on.
“I am going to have to stick to the script. If I muck around with the words it will defeat the object.”
“I put a bullet into the back of the crocodile's neck just behind the head, thus killing it. If a crocodile is hit in any other part of its anatomy it disappears into the water and is irrecoverable.”