Intro to Public Health

My second day of class. We sit in an auditorium with various levels and stair cases, and I was well aware it would be full. I didn't think I cared where I sat as long as I could see, so when I saw the empty row in the very back all the way up the stairs, I took the furthest seat in so other people could have seats too (I hate climbing over people, I can't imagine they like climbing over me, I can be considerate). I was practically up against the railing. Our professor begins to talk about the definitions of public health, talks about how we need to fill out notecards for attendance, and as I reach into my bag to grab a notecard, my notebook falls off my lap, over the railing, and down the flight of stairs. At this point, several people have filled the empty row, our professor has started lecturing, and I'm not really sure what to do. I would just slip through the railing and risk the injuries that could be caused by the jump, but I would cause too much of a racket moving stuff to do that, so I would have to go over the railing, making the jump even steeper. And I'm certain my professor would see me flinging myself over the railing and not let it go unnoticed.

So I'm stuck. I really need to take notes, but the disruption to get it that has even the remotest chance of being a big scene doesn't seem worth it. What do I do?