PLANO, Texas (CNN) - It was an incredible scene at a Texas high school graduation.
Sef Scott, a teenager with autism who usually doesn't speak, made a speech during the Plano High School graduation ceremony.
His words were powerful.
"Unexpected," he said. "That is what i want you to remember - unexpected. First and foremost, I would imagine that to the seniors that know who I am, it is entirely unexpected that I would be standing here giving the speech.
"or the friends and family in attendance here tonight, allow me to briefly explain this unexpected choice of speaker. My name is Sef Scott and I am a student with learning differences. To be more specific, I have autism and a social communication disorder. While i have the vocabulary that you do and I have the ability to physically produce spoken words, it is not the normal thing for me to electively speak. Just by my being here, speaking to all of you - me - that alone is unexpected."
"Remember, if you are following in someone else's footsteps, you will only get where they want to go. be the unexpected like me. do the unexpected for the benefit of others. live the unexpected for your own happiness."
He was greeted with 10 seconds of applause.
Scott said his mother and his brother, a brain tumor survivor, helped him write his graduation speech sentence by sentence.