How it unfolded
Johnson had won the 400m in an Olympic-record 43.49 just three days earlier. At the US trials that June he had already broken Pietro Mennea's 17-year-old 19.72 record, running 19.66, and in the Atlanta final he shaved off another 0.34 seconds. Running with an upright torso and short, rapid strides — a technique coaches had long said couldn't work — he accelerated out of the curve and kept extending his lead down the straight. His 19.32 amounted to running two laps of the 200m at an average pace equal to a 100m world record. Namibia's Frankie Fredericks was second in 19.68 and Trinidad and Tobago's Ato Boldon third in 19.80, times that would have approached the world record in any earlier era. Johnson ran in gold spikes made by Nike and became the first man to win both the 200m and 400m at the same Games.
Why it still matters
This record was 12 years ahead of its time — no one came close until Usain Bolt ran 19.30 at Beijing 2008. Johnson demolished the assumption that the 200m and 400m demanded fundamentally different bodies, redefining the 200m from a race about surviving one hard lap into one about sustaining a uniform top speed.