How Anxiety Leads to Disruptive Behavior: Kids who seem oppositional are often severely anxious

A 10-year-old boy named James has an outburst in school. Upset by something a classmate says to him, he pushes the other boy, and a shoving-match ensues. When the teacher steps in to break it up, James goes ballistic, throwing papers and books around the classroom and bolting out of the room and down the hall. He is finally contained in the vice principal’s office, where staff members try to calm him down. Instead, he kicks the vice principal in a frenzied effort to escape. The staff calls 911, and James ends up in the Emergency Room.

Reference:

Child Mind Institute