Watch: Buckingham Palace guard slips and falls in front of hundreds of tourists
The normally step-perfect 'Changing Of The Guard' suffered an public embarrassment when one of the guards slipped and fell, breaking form.
The guard slipped and fell and had to help himself up as his fellow guards refused to break form and help him.
Onlooking tourists laughed as the humiliated guard struggled to his feet and attempted to regain his composure and finish his routine.
Watch the unintentionally hilarious (and very embarrassing!) clip above.