As soon as they arrive in a health magazine, Vincent inadvertently swallows the anomaly that would allow them to continue their voyage. It's therefore absolutely necessary to remove this foreign body from his body, and finding a surgeon shouldn't be so hard in this magazine... But lo and behold, it seems that most time is spent dealing with false health problems in this world... So much so that the idea of health has little meaning in the unchanging Flat world, even when you have a bicycle in your stomach!