London, UK - One tourist found out the hard way that you shouldn't get too close to the King Guard's horses!

A viral video posted to YouTube shows what happens if you ignore the big sign outside the Household Cavalry Museum that reads: "Beware – Horses might kick or bite. Don't touch the reigns."

It shows one unlucky woman trying to pose with a guard on horseback.

Out of nowhere, the large steed cranes its neck to the side and chomps down on the tourist's arm and chest.

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She cries out and quickly retreats as soon as the horse releases her.

The visibly injured woman passes out from shock a few minutes later.

The isn't the first incident involving a King's Guard horse. In 2023, one woman got dragged off balance when a horse chomped on her ponytail, and another tourist was headbutted by a horse when they got too close for a photo.

Britain's Ministry of Defense told the New York Post at the time: "Signs clearly display warnings that animals may bite and for tourists to keep their distance. This is for the safety of those on duty and the public."