As the US presidential election season starts to heat up, security details may want to review the latest protest tactic being used in Europe: “Milkshaking.”

When Brexit Party leader Nigel Farage was doused Monday with a milkshake while campaigning for the European Parliament elections in the English city of Newcastle, it was unclear who he was more angry with—the protester who threw the drink at him, or the security team that didn’t see it coming.

“It’s a complete failure,” Farage told his security detail as the banana-and-salted-caramel concoction dripped from his lapel. “You could have spotted that a mile away.”

After all, this wasn’t a random attack. “Milkshaking,” as it has come to be known, has emerged as the latest form of protest in Britain, where a number of mostly right-wing political candidates have been drenched by shake-wielding demonstrators on the campaign trail. It began earlier this month when a viral video showed a 23-year-old man dunking a strawberry milkshake on Tommy Robinson, the anti-Muslim activist running as an independent candidate to represent the Northwest region of England in the European Parliament elections. It was the second time in two days that Robinson, whose real name is Stephen Christopher Yaxley-Lennon, was hit with a milkshake.

A 32-year-old-man was arrested on suspicion of common assault and put in handcuffs by police.

Mr Farage tweeted afterwards: ‘Sadly some remainers have become radicalised, to the extent that normal campaigning is becoming impossible.’

He later told reporters that the milkshake was ‘yobbo flavoured’ and he is understood to have made a statement to Northumbria Police.

Brexit minister James Cleverly immediately condemned the episode, insisting that people should debate rather than ‘assault political opponents’.

Tony Blair branded the attack ‘horrible and ridiculous’, while Jo Cox’s widower Brendan Cox said it normalised ‘violence and intimidation’.

It’s gotten so bad that local restaurants have begun to stop serving milkshakes near events (via Ace of Spades).

Why are these attacks occurring? Likely because the “climate change cultists” see that Farage’s Brexit Party is likely to win the upcoming elections.

The latest polling for the European Parliament elections shows that Nigel Farage’s Brexit Party is likely to gain the most votes in the UK, as establishment parties are forecast to lose their majority across the European Union.

The vote takes place in the UK this week, on Thursday 23 May, with the Europe-wide results expected on the evening of Sunday 26 May.

These are expected to see establishment parties across the continent suffer, both at the hands of the populist-Right as well as resurgent liberal parties.

Despite the tactic being juvenile, social justice activists are clamoring to import it.

Saner Brits would like the protestors to be circumspect during President Trump’s upcoming state visit in June.