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Will Smith and Jimmy Fallon rap "It Takes Two"

The Jimmy Fallon throwbacks continue.

A night after Wednesday's "Saved by the Bell" reunion, Fallon had Will Smith on the show and the duo rapped to the Rob Base & DJ E-Z Rock's 1988 hit, "It Takes Two."

"We have a lot in common," Fallon, 40, says to Smith, 46. "You're a famous rapper ... I'm a classically trained beatboxer."

The host then pulled out an iPad complete with a layering and recording app, and the two took turns laying down beats before breaking it down.

Check out the clip below: