Hum makes your character hum to someone. If the command is directed to a certain person, all people in the room will see you hum to this person, and the person in question will see you hum to them.
EXAMPLES
"hum"You: You hum. Anybody: Hotblack hums."hum to Marvin"You: You hum to Marvin. Marvin: Hotblack hums to you. Anybody: Hotblack hums to Marvin.