A boy called Omar borrowed his friend Jack's headphones for the bus. While they were his to look after, he sat on them and cracked the band. He's panicking. When he hands them back, he just says, "Here you go, thanks," and doesn't mention the crack, hoping Jack won't notice straight away — or will think it happened on its own. Jack takes them, not looking closely. Omar walks off with his heart thudding. He knows the crack is there, waiting to be found. He had a choice in that moment — to say "I broke these, I'm sorry" — and he let it slide past. Now the truth is sitting in Jack's bag like a tiny time bomb.