An angry throng of protesters doused a President Trump supporter with a McDonald’s milkshake while chanting “Nazi scum!” on Tuesday.

The supporter, a man who appeared to be in his 60s or 70s and was wearing a red Make America Great Again hat, was in the midst of a tense exchange with the anti-Trump demonstrators when he was struck, according to video by the “Leading Britain’s Conversation” radio show.

He then took the cup and lobbed it back at the crowd.

Police officers in the middle of the fray tried to control the quickly escalating feud.

The mass protest was held in central London in opposition to Trump’s state visit to the UK. He met with outgoing Prime Minister Theresa May on Tuesday.