Somewhere in a book about Jenks (Denis Jenkinson) there is a reference to his sidecar racing days when he was the ballast. The throttle cable broke IIRC and Jenks held the throttle open with his hand. Approaching a tight bend he went to move to put his weight in the right place and was greeted with the foot of the driver holding him in place - more important to keep the throttle open. Must look out the proper reference.
