[mistermann]

I don't quite catch what he's doing in the middle frames?

[pronoiac]

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:_Overstimulate... for more info.

[sukuriant]

He zoned out of the world around him and distracted himself with either the project he was working on prior, or just a stream of consciousness around his get-out-of-too-many-words tool of counting