Exercise diva Richard Simmons is sweatin' to a misdemeanor assault charge after he allegedly slapped a man who made fun of him. According to authorities, Simmons was waiting for a flight to Los Angeles at Phoenix's Sky Harbor International Airport when a fellow passenger screamed, "Hey everybody — It's Richard Simmons! Let's drop our bags and rock to the '50s!" That's when Simmons allegedly force-fed the heckler a fat-free knuckle sandwich.