I went to a production of the Music Man the other day (I'm a sucker for musicals) and, as chance would have it, Dave and his parents were there. Dave is one of my more vocal students: I had a conversation with mom about how demanding to see my teaching credential in the middle of class is beyond rude and would she please have a talk with Dave about doing this.
Of course I went over to say hi! It would have been rude not to. As I greeted mom and dad, Dave turned and noticed me. His jaw dropped, like past the bottom of his chin. I said hi to him but he continued to stare at me with these huge eyes and wide-open mouth. It reminded me a lot of coming face to face with a sunfish at the aquarium once. The whole time, he never said a word to me.......just........stared.
This is not as unusual as you might think. Most students respond with shock when they see their teacher in a mundane location like the grocery store (one of my students actually asked me what I was doing there). I call it "teacher in a box" syndrome. Academically, they know that we are humans with real lives, but on a more primitive level, their id thinks differently. Their id tells them that their teachers never actually leave the classroom. We have cots that are stored in a storage room during the day and we pull them out at night. The cafeteria feeds us our dinner, or even better, we have a plug (stored in our left foot) that we use to recharge our batteries overnight.
Sometimes, I almost wish it were true. I went to my local pharmacist once to pick up some prescription birth control, and discovered that her daughter, one of my students, was sitting behind the counter.