His top speed is such a spectacle, so phenomenal, so searing that many who witness this race, who see [Usain] Bolt cross the line in 9.69 seconds, breaking his own three-month-old world record by three hundredths of a second, don’t notice, until they see the replay, what is perhaps the most salient and frightening thing about his performance: Approximately eighty meters into the race, twenty meters from the finish line, Bolt stops trying.

—Marginal Revolution: Usain Bolt should be running in the 2040 Olympics