Suspension with pay.

I am a Permanent Substitute teacher and I was just suspended for stopping a child from throwing items in a class. I was called into the office the next day stating that they had to investigate the situation. I guess being CPI trained doesn't matter. I stopped the child from throwing items at other students by holding his hands and blocking items from students. The school counselor came in and walked out with the student. He was physicaly fine. He actually came back in the class screaming again. It was a weird day. I felt like I handled the situation no one was hurt and the child was fine. I am new to teaching I am finishing a teacher prep program and plan to be teaching in the fall. I am just worried this will hurt my chances and my reputation. I love teaching and found this late in life. I feel being a larger male may have been reason for them to investigate. I don't know I just don't want to mess up being so close to the goal. I have 3 small kids myself 7, 6, and 4 so I would never do anything to harm a child.