Shuto uchi - 'knife hand strike' - is one of the oldest tools in Okinawan karate, built as an open-hand answer for close-range grabs and chokes. Master Haywood chains it with the elbow and a finishing blade kick to give the defender a complete worst-case answer to a front chokehold: protect the air, break the grip, disrupt control, end the threat, disengage.
Break a front chokehold with a live-hand airway protection, a rising shuto to weaken the grip, a rotating elbow strike to disrupt control, and a downward blade kick finish if the attacker hits the ground.
The instant their hands close on your throat, drive your live hand up between their arms to protect the airway and create an opening. Chin tucks, head turns slightly off the line of the choke. The live hand is your shield and your wedge in one motion.
Through that opening, the other hand fires a shuto upward - the ridge below the pinky, fingers straight and pressed together, thumb tucked - targeting the underside of the jaw, the throat, or the wrists of the choking hands. Delivered hard, it weakens or breaks the hold outright.
Without hesitation, rotate your hips and drive the same arm back through as an elbow strike to disrupt whatever control remains. If the attacker drops or hits the ground, follow up with an appropriate counter - most likely a downward foot-stomp blade kick - only to the level of force reasonably necessary to stop the attack, then disengage and get to safety.