Prince Harry's appearance was a major focus at the coronation of his father, King Charles III, on Saturday, and all eyes were on the estranged royal as he attempted to stay in the background during the lavish ceremony.However, with cameras capturing every moment of the historic proceedings, several of the prince's facial expressions — from stares to smiles to an unexpected grimace — went viral as fans analyzed every moment of his royal return.Body language expert Darren Stanton spoke with ET on Monday to analyze some of the expressions from the royal family over the course of the coronation weekend. «The main thing that I look for are microexpressions,» Stanton explained. «A lot of people don't realize that we have a thing called leakage, so no matter how well-trained somebody is, it gives us a sense of the real emotion that the person is experiencing.»«With Harry, we see sadness, we see the eyebrows come together, we see the mouth droop,» he added of the prince's general demeanor.