There are few things more embarrassing than being snubbed for a handshake or a high five - but imagine it happening in front of billions of people. Spare a thought for Alessandra Viggiano Marra, a Minister of the Embassy of Argentina, who found herself being ignored while entering Westminster Abbey for the Queen's funeral on Monday.
Ms Marra walked in with her husband, Javier Figueroa, the Argentinian ambassador to the UK, along with a number of other diplomats from around the world. Unfortunately, she became a viral sensation after footage of a doorman not taking her outstretched hand started cirulating on social media.
