Ralph Boston of Laurel, Mississippi came to Queens, New York to visit Jamaica High School in 1964. The gold and silver medalist of the Rome and Tokyo Olympics stood before the teenagers in the school gymnasium in his red-white-and-blue warm-up gear and talked about dreams, commitment and hard work. An 18-year-old high school senior and budding long jumper named Bob Beamon stared starry-eyed at Boston and wondered, having no idea that this great Olympian would be providing him life-changing advice four years later.

At the 1968 Mexico City Olympics, Boston was the World and Olympic record holder in the long jump, but the three-time Olympian knew he was approaching the end of his career, and knew that Beamon had a better chance than he did to re-take the long jump Olympic championship back from the Brits and 1964 gold medalist Lynn Davies.

Amateur photographer, Tony Duffy from London learned about Beamon from Boston himself. Duffy was on vacation in Mexico City, sitting poolside with England’s long jumper and ’64 gold medalist, Mary Rand, in the Olympic Village. According to Deadspin, 1964 long jump gold and silver medalists Lynn Davies and Boston walked by and sat down at the same table, and began talking about Beamon.

The subject came around to Bob Beamon, Boston’s precocious American teammate, “a slash of a man, 6’3”, 160 pounds,” according to Sports Illustrated. Boston knew that Davies liked to play psychological games with his opponents, and he had some advice for Davies about the long-limbed, long-necked 22-year-old Beamon: “Don’t get him riled up because he’s liable to jump out of the f—ing pit.”

It’s possible that Boston was also messing with his rival’s head, but Boston knew what Beamon was capable of. And in fact, it was Boston who, on October 17, 1968, provided critical advice to Beamon. According to this great account in LetsRun of that day, Beamon had worked the previous day with sprinters Tommie Smith and John Carlos to work on his own sprinting speed. Beamon could run the 100 yards in 9.5 seconds, a world class sprinting time. But in the qualifying round, Beamon was simply too fast in his first two attempts, overshooting the board and fouling on both attempts. One more miss and Beamon’s great season up to that point, and his amazing potential for Olympic glory would evaporate, leaving the kid from Queens a footnote in the annals of the Mexico City Games, as Boston explained to me:

I said to Bob, “You can’t win gold today.” This is the qualifying round. It just moves you on until tomorrow. He was zipping down that runway. He hit his jump. It was probably as good as when he won on the second day, but he fouled it. “C’mon man,” I said. “All you got to do is jump 7.8 to qualify.” I took my jump and I qualified easily. I took off my spikes. Bob does it again and fouls by over a foot. I said, “Damn it, Bob. Just qualify!”

According to LetsRun, Beamon was extra careful in his final qualifying leap.

He lengthened his run-up, half-jogged down the runway, and did not come close to touching the board; Boston estimated he was 18 inches behind it when he took off, while Beamon thought it was closer to two feet. Still Beamon leaped 8.19 meters (26-10 ½), second only to Boston’s 8.27 (27-1 ¾). He was in the final.

The rest, as they say, is history. On October 18, 1968, Beamon watched three others foul before he started his sprint on his first attempt in the men’s long jump finals. Duffy, the amateur photographer without credentials took advantage of the lax security in the Estadio Olympico Universitario, and parked himself about 50 feet from the long jump pit.

And with his Nikkormat manual drive camera and 300mm lens, he knew to get ready for Beamon, just in case. Covering 130 feet in 19 strides, Beamon launched himself into the air. Sprinter Carlos thought that “he just kept climbing.” And as Beamon finally began his descent, his arms outstretched forward, his mouth and eyes wide open, a blend of possibility and joy etched on his visage, Duffy snapped away on his camera.

Beamon had leapt 8.90 meters. The distance was beyond what the optical sensors in place could pick up so it took some 20 minutes before they could determine the distance by tape measure. And when the board flashed 8.90 meters, Beamon did not know what that meant in feet, but when he learned that he hit 29 ft. 2½ inches, an astounding improvement on the world record of nearly two feet, he fell to his knees in emotional shock.

Everyone knew that after Beamon’s first jump the competition was over. Davies was famously quoted as telling Beamon, “you have destroyed this event.” Beamon made one more attempt, a relatively pedestrian 8.04 meters, and then stopped. He had the world record, one that no one would touch for another 23 years until Mike Powell raised the current world record to 8.95 in 1991.

An East German named Klaus Beer took the silver medal. And with a jump of 8.16 meters, Boston won the bronze medal, completing the gold-silver-bronze set he accumulated over three Olympiads. He also had the heartfelt admiration and gratitude of Beamon, the biggest story of the 1968 Mexico City Olympics, as he explained to a reporter in the Cleveland Plain Dealer on October 19, 1968.

Whatever Beamon has achieved as a long jumper he said he has to credit Boston. “Ralph has helped me since I started jumping as a 12-year old,” Beamon recalled. “He has given me bits of information to help and he still does.”