Hiss makes your character hiss to someone. If the command is directed to a certain person, all people in the room will see you hiss to this person, and the person in question will see you hiss to them.
EXAMPLES
"hiss"You: You hiss. Anybody: Ford hisses."hiss to marvin"You: You hiss to Marvin. Marvin: Ford hisses to you. Anybody: Ford hisses to Marvin.