If you're looking to identify a weakness in Anthony Johnson's game, it sure as heck isn't going to be his confidence.

The former gargantuan welterweight, who needed the Papillon diet to make his cut, is finally moving up a division to compete at a more natural (and likely healthier) weight of 185-pounds.

Unfortunately, his first opponent is former number one contender Vitor Belfort, who welcomes "Rumble" to the middleweight division in the co-main event of UFC 142: "Aldo vs. Mendes" this Saturday night (Jan. 14, 2012) at the HSBC Arena in Rio de Janeiro, Brazil.

It's about as stiff a test as you can get at 185, but that doesn't mean boo to Johnson, who told fans in his latest video diary that "Vitor don't want none of this."

"Jiu-jitsu. I'm gonna submit his ass. Knock him out and submit him, all at the same time. Vitor don't want none of this on the ground. Elbows, baby! Kicks, punches, from my back. I do spinning back kicks from the guard! It's gonna be a good night in Brazil and it's gonna be a bad night in Brazil, all at the same time."

Hear more from Johnson as he trains with the Blackzilians, after the jump.

Alright Maniacs, who's taking "Rumble" in this middleweight mash-up?

More on their upcoming fight at UFC 142 right here.