The implied threat is contempt of court, with whatever jail time or fine hizzoner sees fit to apply.
We call this FELONY EXTORTION
That's nice.
The guys in black robes, surrounded by armed and armored bailiffs, the ones who can decide what is and what isn't contempt, and who can confine anyone for as long as they please (subject to a few limits) call it maintaining courtroom discipline, jury instruction or whatever they damn well please.
You can call the judge out on it any time you please, bless your heart.