Olympic gymnastics stuff-up; Japanese keirin

If you've been watching the gymnastics at the Olympic Games, you'll be an armchair expert by now on the various events and apparatus. Imagine then if one those pieces of equipment was not properly set up - like, say, at the wrong height? It wouldn't happen, would it? One of the Olympic cycling races is the keirin. It's a version of a Japanese cycling sport that's popular but not altogether respectable