In class today (the large lecture class), I was giving a short lecture/recap of some ideas we'd been discussing, including belief systems and the logic of superstitions and magic. Among the things we discussed is the idea of magic as a psychological device to make the person employing it feel empowered. Just about everyone seemed interested.
Everyone except one girl. We take attendance by sign-in sheet, and apparently as soon as it had come around to her, she figured she was done. She got up from the back row and sauntered out the door as I was talking, a breathtaking bit of rudeness, IMHO.
There are two ways to leave a class before the end: asking permission ahead of time, and tearing out of there coughing or with your hand over your mouth as though something very unpleasant will happen if you don't leave.
She did neither.
What I did had a little magical thinking involved: I stopped talking and gave her departing back my total basilisk stare until the door closed. My glance failed to stop her in her tracks, though.
I guess this falls under the category of magic that the Dustin Hoffman character learns about in Little Big Man:
Sometimes the magic works, and sometimes it doesn't.