THIS is the horror moment a jiu-jitsu student was left paralysed from the neck down after being slammed by his black belt instructor.

Jack Greener, a beginner white belt, was seen receiving horrific injuries after his instructor put on a move that struck his neck.

Footage shows Greener pitting against his instructor, dubbed “Sinistro”, inside a training facility.

The beginner was on all fours when his instructor flipped him forward before twisting his head and neck.

Greener immediately lost control over his body and fell to the ground.

He was rushed to the hospital – just days before he was supposed to graduate from college in 2018.

The horrific accident crushed his cervical vertebrae, effectively paralysing his entire body below the neck.

Greener was forced to spend months in the hospital, recovering from multiple strokes as a result of his injuries, according to the New York Post.

He subsequently filed a lawsuit against the Del Mar Jiu Jitsu club in San Diego, attributing his injuries to his instructor, Iturralde, due to the latter’s “dynamic, aggressive grappling style.”

Greener, now a mountain climber and a popular motivational speaker, was first awarded $56 million by a San Diego jury in 2023.

Rahul Ravipudi, one of Greener’s attorneys, remarked: “[The judgement] represents a significant legal success not just for our client, but also for athletes who suffer injuries across California by confirming that sports instructors and facilities can be held liable when they inappropriately elevate risks beyond those naturally present in the sport.”

BJJ icon Rener Gracie, who testified as an expert witness in the case, commented: “The black belt instructor executed a technique that imposed his full body weight on Greener’s neck, causing him to immediately become limp and lose all limb function.”

It comes after a champion martial artist tragically died after a horrific collapse in the ring.

Mohit Sharma, 21, was fighting in the second round of a university wushu tournament on Monday in India.

People immediately rushed to provide assistance, and medics were called.

Sharma, though, could not be revived after a reported suspected heart attack.

According to the Indian Express, he was taken to the on-site medical centre then transported to a district hospital.

But the young boxer sadly passed away as he was declared dead on arrival at Kharar Government hospital on Monday evening, it was later confirmed.

Meanwhile, a mixed martial arts fighter died days after collapsing during a training session.

Zach Doran was sparring at his local gym when his heart suddenly stopped.

The 18-year-old spent 10 days in a coma before his parents Jason and Tami made the “tough” decision to turn his life support machine off.

“He literally fought to his death,” his dad, a teacher and American football coach, said.

“He was doing a sparring session and during round seven or eight, he just collapsed.

“They had thought that he had taken a kick to the chest or a blow to the head, but someone was recording his bouts and it was none of that.

“You could tell he was getting tired and just folded over.”

The “super healthy” teenager, who had been an MMA fighter for two and a half years and was captain of his Varsity American football team, had no underlying health conditions.

But his girlfriend Libby Gilmore, 18, believes energy drinks contributed to Zack’s “shock” passing.

The sportsman reportedly “always had one” before going to the gym or an MMA session, as well as a “pre-workout” – a supplement designed to enhance energy.