In one of the 8th grade classes today there was a fire drill.  The class was going well before that, and the students were paying a moderate amount of attention, but after the drill in the middle of class they were completely lost.  They wouldn’t stop talking, they didn’t follow along in the text, and they didn’t seem to care.  Is this normal for a fire drill day?  Does a disruption to the class really affect the mood of the class that much?