Idiots

I'm in the computer lab at school, where everyone is very, very silent. Everyone, that is, except the girl who came to sit right next to me. She's got earphones on and her music is so loud I can hear it. Then her phone rings and she starts yelling into it because she can't hear because she's still got her earphones on. (Everyone else steps out to talk on the phone. It's sort of the rule.) Then she starts humming to the music. I guess she thinks because she can't hear herself, that nobody else can hear her either. I am debating whether she would notice if I tried to take her picture with my cell phone.