suddenly all is clear

If somebody had informed me that we were experiencing the zombie apocalypse today, I would have figured out this unbelievable headache I've had all day earlier. Obviously the zombies already ate my brain sometime during that four whole hours of sleep I had last night--and here I was blaming my headache and zombie-like shuffle on sleep deprivation.

No need to worry about me, though, folks; vegetarian zombies only eats heads of lettuce, not heads of people.