Originally Posted by
JohnJ80
it’s an excellent example both of how any bike is susceptible and how it can become uncontrollable for even the best riders.
'Best' can well be misleading here. These riders often sacrifice safety to highest speed. Like they sit on the top tube, which is now against race regulations I understand. Here she obviously didn't keep the saddle stabilized between her thighs, else it couldn't oscillate like it does in the video.