<human>: Summarize the given text in a few sentences.

This happened a couple weeks ago at the beginning of the semester and I still feel embarrassed. 

It was the first day of class and I showed up a few minutes late because I had trouble finding the classroom. I generally like to sit at the back but the room was really small and all the back rows were full by the time I arrived so I ended up grabbing a seat in the second row from the front. I'm not the most diligent not-taker in the world, but since I was at the front of the class I decided to make an effort.

A few minutes after the prof started talking I noticed the girl sitting in the row in front of me was clicking her pen quite a bit. I didn't think much of it because I was listening to the prof read over the syllabus. Once the prof finished the course introduction and house-keeping he dove right into the lecture. At this point the girl in front of me began clicking her pen much more frequently and furiously. I love clicking my pen too, but it's annoying when someone around you is doing it incessantly. And she just KEPT CLICKING IT!

This was a 3 hour class and we always get a 10 minute break halfway through. So as the prof signaled that it was break time I loudly said to the back of the girl's head "Hey! Would you please take it easy with the pen clicking? It's really distracting!" The girl slowly turned around and stared at me with her milky, distant-looking eyes. She was blind and the "pen clicking" was her making braille notes. 

I immediately apologized and told her I was way out of line. She laughed about it and said she understood and that she'd try to be quieter. She really is a lovely girl and I felt SOOO bad. I still can't bring myself to sit near her in class anymore.
<bot>: Yelled at a girl for clicking her pen too much in class, turns out she was blind and making braille notes.