|"Is this all real? Or has this been happening inside my head?"
The subject of this article is a real-life person, company, product, or creative work that has been mentioned "in-universe" in a canon source. The Harry Potter Wiki is written from the perspective that all information presented in canon is true (e.g., Hogwarts really exists), and, as such, details contained in this article may differ from real world facts.
Narcolepsy is a chronic sleep disorder where a person experiences extreme fatigue and falls asleep at inappropriate times. The Tutshill Tornados Keeper Merwyn Finwick may have suffered from this, leading to his team's defeat.