For 10 points, what facial expression is enigmatically on display in the Mona Lisa?
Yoko Ono's Film no. 5 shows John Lennon facing the camera for 52 minutes and sporadically doing this action. In another ⢸lm, a mummi⢸ed skull is brie&amp;y superimposed over the transition to a shot of a car being pulled out of a swamp from a shot of a man doing this action, which he begins doing after a &amp;y crawls on his hand. The cow-carrying man called Moschophoros (moh-skoh-foh-rohs) and the standing nude male called Kroisos Kouros (kroh-EE-sohs KOO-rohs) exemplify a trend in the Greek Archaic period of depicting life by having sculptural subjects do this action. Norman Bates does this action while staring into the camera at the end of Psycho. Despite its title, Frans Hals's The Laughing Cavalier shows its subject doing this action. For 10 points, what facial expression is enigmatically on display in the Mona Lisa?
Yoko Ono's Film no. 5 shows John Lennon facing the camera for 52 minutes and sporadically doing this action.
smiling [accept word forms such as smile; accept synonyms such as grinning; accept laughing or synonyms or word forms before "laughing"]