Political attack ads mostly follow the same formula: A foreboding voice, a series of damning facts and figures, and a call for action.

So what makes an ad stand out?

Nancy Pelosi's challenger John Dennis uses a different tact - zombies. There's also a sacrificial lamb and an over-the-top impersonation of Pelosi.

The creation of Chris Burgard, who also cut ads for Herman Cain during his failed bid for the Republican presidential nomination, the new ad casts the California congressswoman as a cult leader of the living-dead as they prepare to sacrifice a lamb.

"We must first gut the sacrifice so that you can find out what's in the sacrifice," the Pelosi impersonator says. The line is a parody of her now-infamous remark about the Affordable Healthcare Act where she said, "We have to pass the bill so that you can find out what is in it."

Dennis, a pro-gay marriage, pro-marijuana Republican, is the hero of the skit, stepping in to save the lamb.

Dennis lost to Pelosi in 2010.