Related:

• You know you've been hacking too long when... ...you count sheep in hex.
• You know you've been hacking too long when... ...you complain in the supermarket about your change and find out you computed it in hex.
• You know you've been hacking too long when... ...you stop by the grocery store on your way home, and write your check out in hex.
• You know you've been hacking too long when... ...you send E-mail and end each line with \n.
• You know you've been hacking too long when... ...that home project you thought would only take a single weekend has now passed its first decade of development.
• You know you've been hacking too long when... ...people talk to you while you're trying to work, and you think, "mesg n".
• You know you've been hacking too long when... ...your last thought when falling asleep i
  while(!asleep()) lambs++...
• You know you've been hacking too long when... ...you are having a bad dream (being chased by space aliens, etc.
  ) and you wake up, only to have another bad dream and realize that you are STILL dreaming, and had been dreaming you were dreaming, so you wake up again, and finally wake up once more and realize you were nested four levels deep in dreaming you were dreaming....
• You know you've been hacking too long when... ...more than once, you have woken up recalling a dream in some programming language.