A short video, which was published by Saudi online media portal AjelNews24 on 29 June, shows the moment when US President Donald Trump apparently attempted to play a harmless joke on Saudi Crown Prince Mohammed bin Salman when their paths crossed at the G20 summit in Osaka, Japan.
The video shows the US president briefly patting the sitting crown prince on the shoulder, prompting the latter to look in the direction he felt the tap came from but failing to spot anyone as Trump has already passed him.
The prince, apparently surprised, then looks in the opposite direction and finally sees Trump who nods at him briefly in response.
A Twitter user named fayez_malki also shared the video, with the caption reading "Look, Trump is joking." However, it hasn't been immediately clear whether Trump's move was a in fact a joke or just a prompt greeting gesture while he was passing by.