joining us is nbc s gadi schwartz. what happened? reporter: it happened live in the netflix show. dave chappelle was on the show just finished joking that comedians have to have more security at awards. all of a sudden, video taken by fans shows a man on the crowd jumping on the stage, charging chappelle. knocking him to the ground and getting up and trying to run away from chappelle s security team who caught him in the back of the stage and appeared to fight with him for several minutes. police say the attacker was arrested. had hi replica gun with a knife blade inside. chris rock who was there ran up to the microphone and yelled, is that will smith? chappelle joking it was a transman, over attacks that have been called transphobic. the attacker was identified as a 25-year-old named isiah lee. he will be charged with assault with a deadly weapon. he was surrounded by jeering