He knocked me down on my back and hit the floor so bad. Reporter he relived the moment he was knocked to the ground and suffered a concussion. This is video which captured the 68yearold teacher motionless in a hallway of the School Seconds after the attack. Reporter the minute your head hit the ground, you were out . Yeah. Reporter johnson was working at the school as a substitute english teacher when he said this all started when a female student sat on a middle School Students lap. I said this is against school rules. Reporter when johnson went to go to the Principals Office to report the pair, he says the student grabbed him and slammed him to the ground. There have been two other similar attacks in a month. Our school has been so underresourced with the necessary support personnel in buildings for the last two years, at least. Reporter but the School District says theyre doing all they can. They released this statement saying the assault occurred making a dramatically poor decision