You mean, other than mentally retreating from the party? He's doing math around the reciprocals of primes. See http://www.explainxkcd.com/wiki/index.php/602:_Ov

You mean, other than mentally retreating from the party? He's doing math around the reciprocals of primes. See http://www.explainxkcd.com/wiki/index.php/602:_Overstimulated http://www.explainxkcd.com/wiki/index.php/602:_Overstimulate... for more info.