Idioms: silent self triggers and gestures; facial expressions

The Mesmerizer offers a lot of functionality that isn't necessarily tied to controlling the sub.   For example, the express command can be used by the sub to adopt various facial expressions.  It takes a single parameter, which is a comma-separated list of expression names to be activated, or, if the name is preceded by "no", to be deactivated.  Any expressions that are already playing will continue to play if they are not mentioned.  "all" is used to indicate all possible expression animations; it's mostly used to cancel all expression animations: express noall.

If the sub isn't listed as an owner in their Mesmerizer's Access notecard, they can't issue commands directly, but an owner can define triggers for them that will do this.  Since the sub won't want to accidentally fire an expression trigger in regular speech, you should make the trigger-phrase something that they are unlikely to say except when they want to fire the trigger, for example "se1" (short for 'set expression 1') for, say, a smile expression:

se1 = subject express smile

Note the use of the subject keyword at the start of the trigger-action.  This keyword means that this trigger will fire only when spoken by the sub.  Now, whenever the subject says "se1" in local, they will smile.  You should probably define a trigger to let them stop making faces too:

se0 = subject express noall

Speaking incantations like "se1" in open chat would be a little distracting to the people around the sub, so the Mesmerizer will also accept self-triggers spoken on channel 98.  So to smile without saying anything strange in local chat, the sub would do "/98 se1".

Finally, the sub could create gestures that issue these channel-98 commands, allowing them to define a keystroke to cause them to smile.  Since gestures can include wait steps, it's easy to define one that will start to smile by issuing a "/98 se1", wait for a few seconds, and then return to a neutral expression with "/98 se0".

Gestures and channel 98 can be used to link any self-trigger to a keystroke.  So you could create, for example, a "panic button" that uses the tpto command to teleport the sub to a safe location.