A tourist in London had an unfortunate run in with a horse that works as part of King Charles III’s official King’s Guard.

Outside The Household Cavalry Museum in London, just over a mile from Buckingham Palace, tourists were visiting the location and taking photos with one of the King’s Guard horses.

In the video, several people approach the guard seated atop a horse in their regimental gear and pose for photos. 

A few times, the horse swings its head towards people if they get too close, and signs are posted warning visitors, "Beware: Horses May Kick or Bite. Don’t touch the reins. Thank you."

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A King's Guard seen on his horse at the entrance of Admiralty House

A horse like the one pictured here with a King's Guard bit a tourist outside The Household Cavalry Museum in London on Sunday. (Kaveh Kazemi/Getty Images)

The woman who was bit walks quickly into frame to pose near the horse, when it swings its head around and bites her hard just above her elbow.

She screams and runs back to her tour group, where her fellow travelers examine her. 

A few moments later, she can be seen kneeling on the ground, with someone behind the camera saying, "she’s still over there…she’s keeling over, look."

Someone asks if she’s got a "really bad injury" and another person responds, "she’s getting treatment now."

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"I thought she was going to pass out," the unseen camera person adds.

WATCH: KING CHARLES III’S GUARD HORSE BITES TOURIST ON ARM

Moments before the tourist is bitten, the horse nearly clamps down on another person, who gave the horse a thumbs up as she stepped near it. The horse then moved its head forward and appeared to lightly bite at her wrist.

The horse can be seen a few other times swinging its head towards other tourists, including two different people who attempted to pet it.

 "I thought she was going to pass out."

— Unseen camera person

The horse also appears slightly agitated at people who walk up too quickly to pose near it, likely due to the sudden movement.

Representatives for Buckingham Palace and The Household Division, who oversee The King’s Guard, did not immediately respond to Fox News Digital's request for comment.

King Charles III and President of Portugal, Marcelo Rebelo de Sousa, inspect the Buckingham Palace detachment of the King's Guard during the president's visit to the UK to mark the 650th Anniversary of the Anglo-Portuguese Alliance on June 15, 2023 in London, England.

King Charles III and President of Portugal, Marcelo Rebelo de Sousa, inspect the Buckingham Palace detachment of the King's Guard during the president's visit to the UK to mark the 650th Anniversary of the Anglo-Portuguese Alliance on June 15, 2023 in London, England. (Victoria Jones - WPA Pool/Getty Images)

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Video from other outlets show that police officers arrived to check on the woman as well.

The King’s Guard (or King’s Life Guard) are one of several divisions of trained soldiers with legitimate military duties as well as ceremonial ones that are posted around Buckingham Palace and the surrounding areas.

The most recognizable members are the uniformed guards posted outside Buckingham Palace with bright red jackets and bearskin hats, who participate in the Changing of the Guard ceremony Monday, Wednesday, Friday, and Sundays.

Tourists and domestic visitors at Buckingham Palace watch in huge numbers as Changing of the Guard takes place of the King's Guard comprised of Coldstream Guards, the Band of the Coldstream Guards and the Scots Guards

The Changing of the Guard is a formal ceremony in which sentries providing ceremonial guard duties at important institutions are relieved by a new batch of sentries. The city attracts millions of international visitors as well as domestic tourists and day-trippers each year. (Mike Kemp/In Pictures via Getty Images)

Prince William is the honorary Colonel of the Welsh Guards, one of the divisions of the King’s Guard.

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Last year, during rehearsals for Trooping the Colour parade, at least three soldiers fainted in the extreme London heat.

Trombonist on ground

A trombone player in the military band was one of several soldiers who fainted during the Colonel's Review, the final rehearsal of the Trooping the Colour, the King's annual birthday parade last summer. (Jonathan Brady/PA via AP)

William later tweeted, "A big thank you to every solider who took part in the Colonel’s Review this morning in the heat. Difficult conditions but you all did a really good job. Thank you."