How to do a short turn in Motorcycle : The Japaneses like U turn

Please find here the upgraded version, with better tips and musics: Here is a movie to explain how to do a very short and fast Uturn, like Japaneses people, when they do Moto Gymkhana. Please be indulgent: I am from France, so my English translations are probably not so good. I hope it is understadable :)