WARNING -- DO NOT TRY THIS MOVE ON ANYONE UNLESS YOU'RE A WORLD CLASS FIGHTER!!!
This is A.J. McKee -- one of the hottest young stars in MMA -- and he's REALLY good at submitting people.
So, when he came to the TMZ newsroom the other day, we had him put Lucas in the same crazy armbar he used beat Derek Campos at Bellator 236 in December ... and yea, it was AWESOME!
McKee is undefeated -- 16-0 as a pro -- with the most consecutive wins in Bellator history, including 5 wins by submission (the most in Bellator featherweight history).