A few years ago at the London Marathon, organizers brought out an industrial-sized treadmill called the Tumbleator. They then tempted the curious with a simple question: can you keep up with Eliud Kipchoge? The answer was obvious. But that did not stop people from trying. Most lasted a few seconds before comically flying out the back onto the mats. The Tumbleator now has a new model: Sabastian Sawe, who on Sunday claimed track and field's latest holy grail by running a sub-two-hour marathon. Imagine running 17 seconds for 100 meters and then maintaining it for 42 kilometers. Or set the treadmill at a pace of 4 minutes 33 seconds per mile and continue for 1 hour 59 minutes 30 seconds. It sounds ridiculous, impossible, laugh-out-loud stupid — until you realize that is EXACTLY what Sawe did in London. Later, amid all the superlatives and searching for perspective, London Marathon race director Hugh Brasher made an EXTRAORDINARY suggestion. Sir Roger Bannister's four-minute mile had been the greatest sporting moment of the 20th century, he told us. And, perhaps, we had witnessed its 21st century equivalent. Your first instinct might be to shudder at the comparison. But Brasher is not someone to be dismissed lightly. His father, Chris, guided Bannister to that famous 3:59.4 mile in May 1954, before organizing the first London Marathon with John Disley in 1981. Hugh also has a deep appreciation for his multi-sport heritage. So is he right? The comparison between Sawe's sub-2-hour marathon and Bannister's four-minute mile is both INTRIGUING and provocative. Both achievements shattered barriers that were once thought to be physiologically impossible. Both were the result of years of incremental progress, with athletes getting closer and closer until finally breaking through. And both have the potential to transform their sport, opening the door for a new generation of athletes to push the boundaries even further. But there are also important DIFFERENCES. Bannister's achievement was a solo effort, achieved on a cinder track with minimal technology and support. Sawe's sub-2-hour marathon was aided by revolutionary footwear, pacemakers, and a course designed for fast times. The debate over how much of the performance is attributable to the athlete and how much to the technology is one that will continue for years, and it touches on FUNDAMENTAL questions about the nature of sport and the role of equipment in athletic achievement. What is UNDENIABLE, however, is the impact that Sawe's performance will have on the sport of distance running. Just as Bannister's four-minute mile inspired a generation of middle-distance runners, Sawe's sub-2-hour marathon will inspire a new generation of marathoners to believe that the impossible is possible. The psychological barrier has been broken, and with it, the floodgates may open. We may see more sub-2-hour marathons in the coming years, just as the four-minute mile became a regular occurrence after Bannister's breakthrough. Whether Sawe's achievement is truly the Bannister moment of our time is a question that will be debated for decades. But one thing is CERTAIN: on a sunny Sunday in London, Sabastian Sawe did something that was once thought to be impossible, and in doing so, he etched his name into the history of sport alongside the very greatest athletes who have ever lived.