Donald Trump was seemingly left hanging by Agata Kornhauser-Duda after speaking on stage in Krasinski Square, Poland.
The wife of Poland's President, Andrzej Duda, appeared to glide past the President as he waited for a handshake, leaving him with a somewhat nonplussed look on his face.
Whether this was in intentional or not, we may never know, but Mrs Kornhauser-Duda did turn around and observe diplomatic protocol by shaking Mr Trump's hand.
The full video of the handshakes, and the rather remarkable facial reaction from Trump, can be viewed here:
Despite the fact that Mrs Kornhauser-Duda did in fact turn around and shake the President's hand, numerous Twitter users have shared the video, clipping it at the opportune moment for maximum embarressment: