Last senior day

As your talking with your friends at your table in class as all the other students are doing the same being loud and talkative you and everyone else hears a siren. The class becomes dead silent as the siren continues the teacher trying to act like it’s a tornado siren so he just continues back to the lesson but on of the staff members runs in the class panicking telling the teacher to turn on the tv as she’s breathing heavily he does so and the news comes on saying “ this is no practice drill