I would report this to a dean, particularly one that's known to be sympathetic to students. You'll have a backup witness
before you get what I assume will be an undeserved C. The dean probably won't care unless/until it affects your grade, but you will have covered yourself. I would drop the class if it wasn't near finals already.
I don't agree with your ejection using your version of what happened, but the prof was within his rights as an instructor. He crosses the line if the incident affects your grade beyond your participation for that session. I wouldn't have responded to the email, but I probably would have when I was in school. You tried to set the record straight without being confrontational, but simply replying was probably affront enough.
This reminds me of an economics prof I had, a very uptight and quite young exchange prof from a top UK university (I don't remember which). I somehow picked up a constant dry cough which interfered with my sleep. I asked him for an extension on an essay 2-3 days in advance, and he replied that he would grant 1-2 days with a doctor's note. I managed to get an appointment at the Med Center within a week, where I was checked over by the on-duty nurse, who initialed a print-out I had made of my symptoms, and got a prescription for cough suppressant syrup with codeine from a doctor who saw me briefly. I took the earliest available appointment, which conflicted with the class, so I ended up going in 1hr late (1.5hr class). I had emailed ahead that the appointment might conflict before I knew the exact time.
He was
not happy. He immediately came over (the class was doing a discussion, I guess) and told me quietly but fiercely that he needed to talk to me after class. As soon as class ended, but even before everyone else had left, he launched into a tirade listing every way that I had disrespected him and his class.
Highlights:
1) Coming in late. True, but then he claimed that I always came in late, which was completely false. I had always been early.
2) Eating breakfast in class. I would usually bring a bagel or some PopTarts. True, but 1) he had never previously mentioned that it was a problem and 2) other students did it also.
3) Doing (2) noisily, being noisy and disruptive in general. I think I was fairly quiet eating. He was probably thinking of the class previous when my cough started acting up, and I rummaged for cough drops and went out for a drink of water. I had the courtesy not to come back until the attack had subsided.
4) Asking for an extension at all - if I took the class seriously, I would do the assignment on time regardless. Around this point, he looked at my initialed printout and commented "you couldn't get a
real doctor to sign this?"
He eventually ran out of steam (probably a little over 10min) and noticed that I had huge bags under my eyes and he couldn't really understand me - I would wheeze instead of actually forming words when I tried to speak. He dismissed me and brusquely told me to get some rest. I negotiated the extension through email, but I ended up not finishing the paper, turning in a short apology letter, and dropping the class.
I heard from an acquaintance who kept the class that he got nicer as he kept losing students over time, and that he was particularly cheerful after Spring Break (confirmed conjugal visit).
