what is the point of the keirin bike race
Keirin Keirin (競輪 / ケイリン, [keːɾiɴ]) – literally "competition ring" – is a form of motor-paced cycle racing in which track cyclists sprint for victory following a speed-controlled start behind a motorized or non-motorized pacer. It was developed in Japan around 1948 for gambling purposes and became an official event at the 2000 Olympics in Sydney, Australia.
Racewalking There are judges on the course to monitor form. Three judges submitting "red cards" for violations results in disqualification. There is a scoreboard placed on the course so competitors can see their violation status. If the third violation is received, the chief judge removes the competitor from the course by showing a red paddle. For monitoring reasons, races are held on a looped course or on a track so judges get to see competitors several times during a race. A judge could also "caution" a competitor that he or she is in danger of losing form by showing a paddle that indicates either losing contact or bent knees. No judge may submit more than one card for each walker and the chief judge may not submit any cards; it is his or her job only to disqualify the offending walker. Disqualifications are routine at the elite level, such as the famous case of Jane Saville, disqualified within sight of a gold medal in front of her home crowd in the 2000 Summer Olympics, or Yet Lyu, disqualified 20 meters before the finish line at the 2017 World Championships in Athletics.