The rain tapped on the windows of the media room, and Maja counted the drops. Igor emerged from under the desk, holding the cable like a trophy proudly. Mr Zurek had installed the school's new Milosz 4000 radio system today. It was supposed to read announcements and sound more human than a vending machine sandwich. Instead, it laughed, whimpered and confused the bell with the doorbell. That is, we were sure he was only amusingly mistaken, sometimes. - 'Let's check the calibration,' said Igor, tapping the keyboard like a determined pianist. On the screen we were enticed by a box: Message text, flashing like a neon sign. Maja typed in the sentence: Please be quiet in the corridor, immediately please. Miłosz 4000 read: Please have cake in the corridor, immediately please. Three seconds later, yeast cakes fell from the ceiling, perfectly legal and fragrant. The silence was beautiful as everyone ate two at a time, without comment. - 'It's not a joke, it's practical error magic,' hissed Maja, wildly. Mr Zurek peeked into the common room, carrying a box of cables and biscuits. 'Kids, I'll leave you for a while, the audio is still lapping, take it easy. As he disappeared, Igor put down the biscuit and closed the door with a hook. - If this reading comes true, we need to watch out for typos, scary. - Or use them wisely, for example on a chemistry paper. Maja typed for the test: Cartoon cancelled, please be quiet, today. The speaker sneezed and announced: Midterm cancelled, please be quiet, today. A wave of whispers about the mystery soup went through the classrooms, which amused everyone. Then Principal Czubek's phone rang, and her heels sped up like a metronome. - 'We're having an alarm rehearsal in ten minutes, we're recording an official announcement,' came from the corridor. A schedule flashed on the screen, and a draft message glowed below it. Maja took a breath as the sketch read: All classes are flying to the pitch. Igor clicked edit, but the programme blinked and went into auto-broadcast mode. The door jammed, the red light came on and the speaker emitted a menacing beep. A timer popped up from the top corner of the screen, like a Christmas tree bauble clock. Ten seconds to broadcast, five words, one mistake, and the whole town would fly....