Based on the uniform, the horse in front of the white horse seems to be part of the Garde Republicaine which is the ceremonial horse guard for the French president. The rider is riding one-handed. I doubt that horse was drugged.
The point pertinent for this thread is that GP dressage horses…horses supposed to be at the pinnacle of their training…have been known to freak out when entering a quiet, perfectly groomed 20x60m enclosure…all because dressage has become a test of showy of gaits…which is apparently what CD was attempting to elicit. How many times have riders been given the comment “could show more lift behind in the canter?”
In the (link) FEI Dressage Manual, you get the directive
The expression “good hock action” underlines the importance of an impulsion originating from the activity of the hindquarters.
This is a quote from MY HORSES, MY TEACHER by Alois Podhajsky
http://www.lipizzan.com/teacher.html
. . in Stockholm . . . At a collected canter I rode into the completely dark stadium and reached the place of our performance surrounded by a circle of four spotlights which had followed me. All alone in the dazzling light I waited for what was to come. Suddenly I heard the deafening noise of a helicopter circling above me and saw its brightly lit cockpit.
PLUTO THEODOROSTA, too, discovered the deafening and blinding object, which sank slowly to the ground. Terrified, he prepared to take a hasty retreat, which would certainly have been the most natural thing for him to do. I was aghast at the idea of having him race around in a panic in the vast space of the arena, accompanied by the roaring laughter of some twenty-two thousand spectators.
I was about to face the greatest disgrace of my life, the sublime and the ridiculous being so close together.
In a desperate attempt to save my reputation, I applied the reins and took a firm contact with the mouth of the excited stallion. I pressed my legs with all my strength to his body to make him feel that I was with him and to remind him of the obedience I had built up in years of training. I was not at all sure of the effect of my aids. Would I be able to hold the powerful stallion? It was a terrible moment.
But PLUTO THEODOROSTA remained motionless on the spot. His obedience was stronger than his panic! He continued to stand motionless when the brightly lit monster approached more and more noisily and the wind of its blades whistled around our ears. This hot-tempered Lipizzaner stood like a monument, and only my legs pressed to his flanks felt him tremble.
The helicopter touched the ground at a distance of about twenty yards and two small children in Swedish national costume left the cockpit. PLUTO THEODOROSTA again obeyed when I ordered him to approach, in a passage, the two children who waited for me in front of the helicopter. The little girl handed me a huge bouquet of flowers and the boy presented one of those well-known Swedish horses which are said to bring good luck. It was of solid wood and the size of a full-grown poodle.
Hardly had I recovered from astonishment at the weight of this present when I realised that everybody had withdrawn into the darkness and that I was alone again in the arena, my hands full with reins, whip, two-cornered hat, flowers, and Swedish horse. How would I manage a decent exit with all these burdens?
In a collected canter I set PLUTO THEODOROSTA in the direction of the gate, followed by the circle of the spotlights, and carried by the enthusiastic applause surging from the darkness surrounding me. My burdens, especially the “horse of luck,” seemed to become heavier all the time and PLUTO THEODOROSTA became faster and faster. We reached the saddling area at last by the sweat of our brow but without accident, and there my faithful Flasar delivered me of my various loads and cavalry officers and experts crowded in on me congratulating me on PLUTO THEODOROSTA’s obedience. They proclaimed him the “perfect dressage horse”! . . . .