On the morning of the second day out of Cape Town (ie just before the third flight of the journey), when instead of leaving solo, Ewald jumped in the front. Nobody knew about it (neither I, the film crew or anyone else) until perhaps 20 minutes before... When it became obvious after a couple of days that this was the new 'normal', the sponsors were informed.
Thanks, Sam. That sheds some interesting further light on this fascinating saga.