The U.S. and Poland's presidential couples were shaking hands Thursday before Trump's speech in front of a crowd in Warsaw, the Polish capital.
Poland's first lady, Agata Kornhauser-Duda, shook hands with Trump and then all four of them lined up for a photograph.
She then moved with an extended hand toward Melania, but Trump, standing nearer, thought the handshake was for him again and reached out to Kornhauser-Duda. He flashed a somewhat startled and disappointed look when the Polish president's wife shook Melania's hand, not his.
Quickly sizing up the situation, Kornhauser-Duda gave Trump a second handshake and he gave her a pardoning smile.
Agata Dudas did shake hands later with him but to clarify it Poland's President Andrzej Duda posted a video on Twitter. But by then Twitter again erupted ridiculing Trump. Checkout some of the best tweets below.
(With additional information from AP)