The sudden rush of social behavior and morale that overpowers you. Most would say they have had these moments, but they just don't know how to explain it. Moments where nothing you say ever sounds retarded, witty one liners are flying out of your mouth left and right. Some might call this a "buzz" of genuine confidence without the consumption of booze.
"Daryl sure is the life of the party tonight."
"The man is socially unstoppable."