Simon Pegg editorializes that zombies shouldn't run. And yes, he uses the "z" word despite its ridiculousness.
Personally, I'm not all that scared of zombies. What's the worst they can do? Rip you apart? You're in terrible pain for a little while and then you're dead. Big deal. Now eternal madness and torment, like Jacob's Ladder, that's scary.
(An aside: when I went to look up Jacob's Ladder, IMDB gave me an ad for Quantum of Solace. My first reaction was "when did they get Rene Auberjonois to play Bond?")
(A second aside: Craig Ferguson was on "Red Dwarf?")