An angry-looking Theresa May confronted European Commission President Jean-Claude Juncker on Friday after EU leaders rejected her latest Brexit proposals and he publicly chastised her approach to negotiations.
Arriving at a meeting of European leaders in Brussels this morning, May was filmed approaching Juncker and having what looked like a frosty exchange with the EU chief, in which she appeared to say: "You called me nebulous." Juncker responded by putting his hand on May's arm, as if to calm her down.
On Thursday evening, Juncker accused the UK prime minister of being "nebulous and imprecise" in Brexit talks after the EU refused to make changes to the legally binding Withdrawal Agreement.
May arrived in Brussels for the European Council summit wanting the EU to make legally binding reassurances that the "backstop" for avoiding a hard border on the island of Ireland will be temporary.
The backstop - which will come into effect in December 2020 if a new trade deal that protects the invisible Irish border isn't ready - would keep the UK in the EU's customs union and Northern Ireland in parts of the single market.
Brexiteers in Westminster are concerned that if activated, the backstop would keep the UK trapped in the EU's customs union indefinitely - or even forever - stuck with EU rules and a limited ability to sign new trade deals.
The Democratic Unionist Party, which props up May's government, also hates the current terms of the backstop because it would create new border checks between Northern Ireland and the rest of the UK.
EU leaders have insisted that the deal could not be renegotiated.
The prime minister looked sombre when she arrived at the European Council on Friday morning, after failing to win changes to the deal which she had promised to hostile Brexiteers in Westminster.
Arlene Foster - leader of Northern Ireland's Democratic Unionist Party, which is propping up the Conservative government - said that while the EU's reaction was "unsurprising" it was up to May whether she would "stand up to them or whether she will roll over as has happened previously."