"Busta Rhymes and Eminem are no strangers to one another, having previously teamed up for 2006’s “I’ll Hurt You”. But if the comic book-referencing cover art is any indication, their latest collaboration, entitled “Calm Down”, is a mighty clash of rap’s swiftest lyrical titans. Of course, no battle can truly begin without the right music; producer Scoop DeVille borrows the horns from House of Pain’s classic “Jump Around”. From there, two of the most furious spitters in all of rap-dom engage in six minutes of…