Since you saw it on IFC it sounds like it could be Romero's follow up flick to "Night of the Living Dead"; "Dawn of the Dead"
Great flick for it's time, good shock value (just like the lower quality Night) that pretty much defined the genre.
Tired, however, by todays standard's for gore flicks.

I can't wait for the American release of "Machine Girl"
Nubile Schoolgirl, Yakuza & Ninjas, inventive Japanese gore!
What's not to love?




http://www.youtube.com/watch?v=eSpCWJnnWVI