Over the course of the next six months, an unexpected side effect started to emerge. It first happened, according to the report, when Mr B happened to hear the Johnny Cash song Ring of Fire on the radio. “From this moment on,” the report says, “Mr B kept listening simply and solely to Johnny Cash and bought all his CDs and DVDs.”

When listening to his favourite songs, the report adds, Mr B felt like he was the hero in a movie, and although he played Johnny Cash songs almost exclusively for the following years, the music never annoyed him.