Bomb in my classroom?!

Okay so today I had to write this huge German test and everybody in class was super nervous and so totally not prepared and suddenly we heard this weird ticking noise. One guy from my class was getting really annoyed by it so he tried to find out what it was. So a backpack at the back of the class caught his attention. He stood up and opened it and there was a weird thing in it. It was wrapped in black duct tape and there were wires on it. So of course everybody immediatly freaked out but still we all thought it was kinda funny and were hoping that we wouldn't have to write the test (it equals 1/3 of our grade so...). So one girl ran out to tell the principal about it. He came and took the backpack with him and later when we were all writing the test he came back to tell us that it was a fucking metronome! Seriously who the fuck has a ticking metronome in his bag?
But yeah all the excitement was for nothing and I sucked at the test. YEAH

Tudelu
Lou