.. you consider a databook "good reading" when you're on the toilet.

.. the first thing you do with anything new is take it apart to see how it works.

.. the last time you moved, you needed two dumpsters to haul off the scrap electrical parts from your work room.

.. you not only know what a left-handed constabulator is, but you designed one once, for fun.

.. you paid more for math and science books during college than most people pay for tuition.