Stupid or what?

The other day, our schedule was as I often say "very messed." We had first period during seventh period, and second during eighth. Although since we had a substitute first/seventh period teacher, who kept saying things like "We have to go." I got the impression that it was time to go home. (It was probably a combonation of that, and the fact that I was so eager to leave.) So at the end of the class, I opened up my locker, got my coat and started to leave. All the pepole laughing seemed to tell me otherwise....