<human>: Wow, this actually happened today - about half an hour ago to be more accurate. I am currently sat on a bench further down the street.

For context, I live in England and I am 16 years old so I am in what is known as year 11, the final year at this particular school. This means that I will be starting my GCSE exams in two weeks time. A new Head Teacher (Principal) joined the school at the beginning of the previous  who, in my opinion, does not measure up to the standard of the previous occupant of his job. He as merely created false problems for himself to solve and areas where he is able to blame others for problems. One piece of shit in particular is the purple pen of progress also known as his method make us waste entire lessons.

Right, to the fuck up. This morning I decided not to stay behind for any lesson after school. The bus routes are now as awkward as hell due to road closures so I am now unable to use them to travel home after school. During the day, I was persuaded to stay behind for a revision session. 

When it got to half past three, I walked over to the mentioned classroom and placed my things. I then moved over to the main office to phone my parents saying that I would be staying later. Beside the main office were two members of the school's senior leadership team including the head. He began to point at the phone and make me to end the phone call. I did in fact do this before literally telling him to "please fuck your(him)self". I then stuck up my middle finger, returned to the classroom, picked up my things then walked to the bus stop.

I have also found out that my mother has just been called into school.

Can you condense the text into three sentences or less?
<bot>: Head teacher tried to take my phone off me after school. I refused and told him to fuck off before sticking my finger up at him.*