Beamon entered the 1968 Summer Olympics in Mexico City as the favorite to win the gold medal, having won 22 of the 23 meets he had competed in that year, including a career best of 8.33 m and a world's best of 8.39 m that was ineligible for the record books due to excessive wind assistance. That year he won the AAU and NCAA indoor long jump and triple jump titles, as well as the AAU outdoor long jump title. He came close to missing the Olympic final, overstepping on his first two attempts in qualifying. With only one chance left, Beamon re-measured his approach run from a spot in front of the board and made a fair jump that advanced him to the final. There he faced the two previous gold-medal winners, American Ralph Boston and Lynn Davies of Great Britain, and twice bronze medallist Igor Ter-Ovanesyan of the Soviet Union. On October 18, Beamon set a world record for the long jump with a first jump of 8.90 m, bettering the existing record by 55 cm. When the announcer called out the distance for the jump, Beamon—unfamiliar with metric measurements—still did not realize what he had done. When his teammate and coach Ralph Boston told him that he had broken the world record by nearly two feet, his legs gave way and an astonished and overwhelmed Beamon suffered a brief cataplexy attack brought on by the emotional shock, and collapsed to his knees, his body unable to support itself, placing his hands over his face. The defending Olympic champion Lynn Davies told Beamon, "You have destroyed this event", and in sports jargon, a new adjective – Beamonesque – came into use to describe spectacular feats. Prior to Beamon's jump, the world record had been broken thirteen times since 1901, with an average increase of 6 cm and the largest increase being 15 cm. In the years following the jump, the mark was considered unbeatable. It took 12 years for another human being to jump 28 feet, much less 29. His world record stood for 23 years until it was finally broken in 1991 when Mike Powell jumped 8.95 m at the World Championships in Tokyo, but Beamon's jump is still the Olympic record and years later remains the second-longestwind-legal jump in history. One journalist called Beamon "the man who saw lightning". Sports journalist Dick Schaap wrote a book about the leap, The Perfect Jump. Beamon landed his jump near the far end of the sand pit, but the optical device which had been installed to measure jump distances was not designed to measure a jump of such length. This forced the officials to measure the jump manually which added to the jump's aura. Beamon's world-record jump was named by Sports Illustrated magazine as one of the five greatest sports moments of the 20th century.
Later life
Shortly after the Mexico City Olympics, Beamon was drafted by the Phoenix Suns in the 15th round of the 1969 NBA draft but never played in an NBA game. In 1972 he graduated from Adelphi University with a degree in sociology. Beamon has worked in a variety of roles to promote youth athleticism, including collaborations with former California governor Arnold Schwarzenegger and Beamon's work at the athletic programs of several universities. He is a graphic artist with work exhibited by the Art of the Olympians, and was the former chief executive of the Art of the Olympians Museum in Fort Myers, Florida.