In 1077, Robert instigated his first insurrection against his father as the result of a prank played by his younger brothers William Rufus and Henry, who had dumped a full chamber-pot over his head.
Pada 1077, Robert menghasut pemberontakan pertamanya terhadap ayahnya sebagai hasil dari lelucon yang dimainkan oleh adik-adiknya, William Rufus dan Henry, yang telah menjatuhkan pot pispot di atas kepalanya.