Oh gosh, during the fall semester my freshman year, I was living in the dorms. It was October and was beginning to get chilly, so everybody was turning on their heaters. Apparently the heaters hadn't been turned on since the previous winter, so there was lot of stuff built up, such as dust, which began to smoke. Needless to say, for about a week, we were woken up about 5 times a night to the sound of the damn fire alarms. We all had to evacuate, of course, and it was rather nippy out. It was such a pain in the butt! I remember using that as an excuse not to go to class though.