There was anarchy on Pall Mall over the weekend when good samaritan and dad dancing aficionado Prince William copped water to the face during the London Marathon.
Amongst the 40,300 runners taking part in the annual 42 kilometre race, a fit Johnny Rotten-type splashed the third in line to the throne while he, his wife Catherine, Duchess of Cambridge and brother Prince Harry handed out water to competitors.
While her husband was drying himself off, the duchess was cheekily amused.
An analysis of the situation by Jezebel said it best:
"Here they are, racking up goodwill with the hoi polloi, pretending to enjoy themselves as the sweaty peasants drag their broken, disgusting bodies over the course of 26.2 miles.
"Kate is calm and collected - suspiciously calm. I bet she paid that runner to douse her husband so she never has to return to the lousy London Marathon ever again."
Interestingly Prince Harry - renowned as the family's biggest prankster, albeit slightly more politically correct than his grandfather Prince Philip - is missing from the images at the time the rouge H20 was splashed on his older brother.
MI6 will investigate*.
(* = no, no they won't.)
However behind-the-scenes video shows Harry was indeed the culprit.
A rookie mistake considering, if rumours are to be believed, he may soon be engaged to Suits star Meghan Markle and be looking down the barrel of a stag night full of karmic pranks.
Video: William, Kate and Harry hand out water #LondonMarathon #tea pic.twitter.com/gAQ6Xi4BTC
— Rebecca English (@RE_DailyMail) April 23, 2017
The three royals were at the start line and several hydration stations of the race to represent their mental health campaign, Heads Together, which was the official charity of the marathon that, this year, drew a record attendance.
Despite the aqua attack the royal couple were also bombarded with high-fives, hugs and selfies throughout their time on the course.
Their participation with the plebs is another way the young royals are shaking up The Firm. The trio, who have kiboshed the "Stiff Upper Lip" vibe of previous generations of royals, recently openly discussed the impact Princess Diana's death had on the two prince's mental health.
Watch The Duke and Duchess of Cambridge and Prince Harry in conversation on mental health for @heads_together #oktosay pic.twitter.com/417gqyqzk0
— Kensington Palace (@KensingtonRoyal) April 21, 2017
The duke and duchess then appeared on BBC Radio 1 to chew the fat about their favourite things: take-away curries and Game of Thrones binges.