Curtsey makes your character curtsey to someone. If the command is directed to a certain person, all people in the room will see you curtsey to this person, and the person in question will see you curtsey to him.
EXAMPLES
"curtsey"You: You drop a curtsey. Anybody: Hotblack drops a curtsey."curtsey to Marvin"You: You curtsey to Marvin. Marvin: otblack drops a curtsey to you. Anybody: Hotblack drops a curtsey to Marvin.