Matt explores the question, 'What Happened?' at this year's IRONMAN World Championships.

Performance predictability and all other signs pointed to a magical day on the Big Island for Sarah Piampiano, a fierce competitor who is coming off her best year of almost a decade in professional racing.

Unfortunately, the day was far from magical.

What lessons did coach and athlete draw from the day, and what lessons can you take from this high-profile example?

There are no guarantees in sport, which is what makes it so beautiful and painful at the same time.

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