Time stresses me.
I'm stressed when I'm behind schedule, when I'm running late for an appointment or running "just on time" for one. I'm stressed about missing time with loved ones. Wasting time. Running out of time.
But, I tolerate the latter better.
Oh, and zombies. My guess is in times of zombie apocalypse, the first two won't bother me as much.
Yes, but there's also missing a meal. That might even supersede the zombie issue.