An already emotional scene was ramped up after a man inside the courtroom lunged at Buffalo mass shooter Payton Gendron during the monster's sentencing hearing.

Barbara Massey, who lost her sister, Katherine, during the attack in May 2022 which left 10 dead, addressed the shooter directly Wednesday inside an Erie County Courthouse. Massey exclaimed, "My sister Katherine Massey was a great person, Kat didn't hurt anybody ... You don't know a damn thing about Black people, we're human, we like our kids to go to good schools, we love our kids. We never go in neighborhoods and take people out."

At that point, a man dressed in grey who was standing next to Barbara pushed her aside and lunged at Gendron, only to be restrained by several officers protecting the murderer.

As the incident happened, you can hear several people in the crowd become emotional ... and both Gendron and the man who lunged at him were escorted out.

Gendron, who is white, killed 10 Black people and wounded several others during a mass shooting at a Buffalo-area grocery store.

Gendron live streamed his brutal attack, carrying out the killings with an automatic weapon inscribed with racist words and phrases -- including the N-word and "Here's your reparations."

He's expected to be sentenced to life in prison -- pleading guilty to charges including domestic terrorism motivated by hate and murder.

The hearing resumed after a brief pause to settle the courtroom.