If you're not a baseball fan you may not know that Derek Jeter is retiring at the end of this season. Gatorade just released a classy commercial showing the New York Yankee shortstop walking through the Bronx talking to fans on his way into the stadium while Frank Sinatra's "My Way" plays in the background (Video above).
A little boy gets an autographed baseball from "Captain Clutch" and the expression on his face is heartwarming (0:56 - 0:58) - and it's a classic nonverbal for surprise.
Sincere surprise is very evanescent, lasting only for a second or two, occasionally slightly more. Real surprise always is followed rapidly by another emotion - here it highly likely that it will be joy-happiness (The video cuts away and we don't get to see it). Note the wide open mouth in a vertically-shaped oval. Teeth are almost never visible in the context of sincere surprise (an exception for this may be seen when it is transitioning to fear). The eyes are also opened very widely with true surprise.
When a person is faking or exaggerating surprise, their body language betrays them. The teeth are visible and the mouth is also more horizontally opened (vs. sincere surprise). In addition, the eyes are not opened as wide in those feigning surprise.
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