The mating dance
There’s a certain level of geekery you’ve achieved when you’re dancing in a nightclub on a Friday night, it’s three in the morning, you’re drunk as an ass, and you’re mentally describing the scene around you in XML.
Better yet, you try to formulate a regular expression simple enough (yet accurate enough) to pass to grep, thereby filtering the unsuitable women from the dancefloor. I make myself want to puke sometimes.