Zombie movies are getting to be like sonnets; the standard elements have almost become strictures of form, within which a director can ply his art.

Witness Day X, just out from Image Entertainment:

As a mysterious outbreak transforms the general populace into a throng of marauding, flesh-eating creatures, eleven strangers find themselves trapped in an abandoned steel mill. One of them, the enigmatic Frank Chambers (Ken Edwards), is accompanied by a comatose white-haired girl who may be the key to revealing the horrific truth behind the infection. Time is running out, and the end is nearer than you think!

See what I mean?

(I love how the trailer shows that you can plow your way right through a throng of zombies at a brisk walk.)

The DVD includes making-of footage, and commentary by star Ken Edwards. $20.99 at Amazon.com.