Yesterday was nation day and oso my worst day of life =.= we were suppose to set up stores for the festival in our class and were decorating our class. And a group of upper sec came into our class.we tought they were going buy something from our store but we were wrong.they ask us get out of our class and so we did cause we was scared they were 10 to 25 upper sec.when we got out of our class,they lock us out and we heard lots of loud noise coming out from our class.when they came out , our class was mess up and chair our broken we notice that they were fighting in our class and mess up our class.At the end of the day teacher was finding who did these.the other class was mess up too.we have to stay back to clean up...