Trump should wear a strobbing tie clasp and bright yellow clothing. He should also wave frantically and raise his voice at times.
This will cause her to go catatonic and fall forward onto her face.
She will have blue glasses, and a receiver under the silencers in her ear. She may not even hear anything said except for what comes into her receiver. Trump can probably induce a freeze-up by demanding something of her as the “moderator” is addressing her. Several demands for her attention at once seems to be what causes the brain freezes and if Igor comes over to tell her to keep talking, she is done.