I think he flipped the desk because he was upset at being accused of smoking
And also you were held back THREE grades, despite excellent grades… I know cigarette smoke isnt healthy…but, because you were exposed to some cigarette smoke your lungs collapsed twice by age of fifteen, had pneumonia every single year, got held back three times despite excellent grades, your teacher threw your desk right out the window ,ripped the locker off its hinges and you slept in a tent. you didnt by any chance also become an orphan or have to walk barefoot every day ten miles to a bus stop or something like that, did you? Im sorry I know its not healthy, just like some other things like kids who are fed candy and soda and mcdonalds every day,but this reads almost like a country western song. Did all of this really happen? …
He said a desk was thrown out of a third floor window…this is a symptom of something, but its not caused by cigarette smoke. If the teacher literally picked up the desk and hurled it out the third floor window, he had a problem that had nothing to do with cigarette smoke, ditto if it was the student.
You forgot to mention the obvious brain damage.