Today a student's cell phone went off in one of my classes. And kept going off. Really quite distracting. It was an accident, of course--and to the student's enormous credit, s/he scrambled to turn it off, instead of answering it. Which, apparently is not always the case, if this YouTube video is to be believed. (Note that for some reason I can't get the video to load to this blog post, so you'll have to link to it on another site. My apologies.)
Personally, I have trouble believing this is a real event in a class, and just happened to be surreptitiously videoed. I would have believed it more if the prof had leaped the first three rows, grabbed the recording device, and the video had ended with the screen going black as the recording device was smashed to the ground. That would have been truly exciting.
Or maybe this was a sanctioned videoing of the class. The way the camera tracks in perfectly horizontal fashion suggests it is not a camera phone, so maybe that's it. But then again, if I had been the prof, I would have been sorely tempted to confiscate the recording. So I think (I hope) it's staged.
In any event, I promise not to destroy phones in my class if people decide to hold rude sidebar discussions by phone. But I do not promise to not throw someone out of class if that happens.