Undead on arrival: should zombies run or lurch?

From 28 Days Later to Army of the Dead, fast zombies are everywhere - but aren't they supposed to be slow and unsteady?

In the Guide's weekly Solved! column, we look into a crucial pop-culture question you've been burning to know the answer to - and settle it

You used to know where you were with zombies. Normally it was 10ft ahead of them, watching them lurch pathetically towards you. This afforded plenty of time to find a baseball bat, something sharp, maybe even a chainsaw. If The Walking Dead, which wraps up after 11 seasons this autumn, has taught us anything, it's that zombies only really become a problem if there's a horde of them.