A video shows world leaders greeting each other at the start of the NATO summit, while the UK prime minister lingered around awkwardly, with hands in his pockets.
People were quick to make jabs at the Tory leader on Twitter, with some dubbing the song ‘All by me and the ‘Curb your enthusiasm’ soundtrack over the clip.
One user said it looked like ‘an undress rehearsal for The Emperor’s New Clothes.
But another video broadcasted on Sky News then shows Mr. Johnson shaking Mr. Biden’s hand.
It comes after Ukrainian president Volodymyr Zelensky called for worldwide protests against the Kremlin’s regime.
Addressing the summit by video from Kyiv, he called for ‘military assistance without limitations’ as Russia is ‘without limits using its entire arsenal’.
More specifically, the Ukrainian leader asked for ‘1% of all your planes, 1% of all your tanks’.
‘We can’t just buy those’, Mr. Zelensky said, airing his frustration. ‘When we will have all this, it will give us, just like you, 100% security.’
Mr. Johnson admitted it would ‘logistically’ be ‘very difficult to supply the tanks and jets, but said allies would strive to give Mr. Zelensky weapons ‘in the quantity and of the quality he needs to defend his nation from the Russian invasion.
He added: ‘What President Zelensky wants is to try to relieve. Mariupol and to help the thousands of Ukrainian fighters in the city.
‘To that end, he does need armor, as he sees it. We are looking at what we can do to help.
‘But logistically it looks very difficult both with armor and with jets.