He was fighting with a teacher!!
Ahhh one of those children. 
Or one of those teachers.
Many many years ago I felt impelled to give one of my teachers a "bit of a slap".
He was a sadistic b@st@rd and someone had to do it one day. It fell to me.
He left the school and I enjoyed a public six with the cane across the arse from the Head
Plus a lecture about "Talking the law into own hands etc.
He (the head) made me a prefect the following week.
A very wise man that Head.