Ja Rule Joins The Zombie Apocalypse

You've never seen the rapper like this.

Ja Rule is known for stating "IT'S MURDA!" -- but for some reason the chart-topper is flipping his usual catchphrase to an eerie moan of "BRAAAAINS...BRAINS!" instead.

Why the creepy change? In the clip below, the "Follow the Rules" dad (you can watch his MTV docu-series every Monday at 10/9c) hits the recording studio to lay down a track about his family -- but things quickly take a spooky turn. The reason? The rapper suffered a "dog bite" that "affected" his performance -- and as a result, something other than raps are coming from his mouth. A hint: a bit of red substance.

Ick! See the gory zombie action for yourself:

And now, the truth behind the brain-muncher transformation: MTV teamed up with the "Scout's Guide to the Zombie Apocalypse" crew to turn Ja into one of the creatures from the film, which opens (appropriately) on Halloween. Check out the father of three's spooky makeover below:

Be sure to watch a healthy and human Ja on "Follow the Rules" every Monday at 10/9c -- and check out "Scout's Guide to the Zombie Apocalypse" when it opens in theaters on October 31!