My other reason for believing it was fake is the way he immediately wheeled around and went back to his seat.
So let me ask you: you've been provoked enough to get up and walk on the stage to "defend your wife's honor" ... and a "slap & retreat" is sufficient? Maybe I do just slap him upside the dome, but that AT MINIMUM is just the precursor to requiring he apologize to her right now, in front of everyone, while I'm standing here. I mean, if you are committed to climbing on stage, might as well accept jail is a possibility and be ready to see this thing through.