You know you're a geek when...
Somehow the topic of two-column geometry proofs came up in conversation last night. I remember when we did two-column proofs for a short while in high school. Everyone else found them either hopelessly tedious or utterly inscrutable, but I found them comfortingly familiar. You see, I'd spent the previous year learning z80 assembly for my Ti-83+, and found two-column proofs to operate at a similar level of abstraction -- and be similarly formatted to boot.