Now since it's been commented that Chris is a horrible narrator, I had a thought regarding his time at Nathaniel Greene Elementary. In 1991, Chris was 9 years old. He had started talking again at age seven. I don't know what triggered him, but Chris apparently went back to his screeching, causing the school staff to "pin him down and record his screams." I'd figured it was real, until I cross referenced the school and the name of the principal and found nothing. I, along with everyone here, assume that Borb told Chris that in order to scam the school out of money.
It's strange that Chris still held on to this.