Fallon & Smith Perform "Evolution of Hip-Hop Dancing" on show

And while they both attempted to do the "Leg Thing No One Can Do," it was the "Spank That" move that tripped Smith up. Fallon transitioned into "Dirt Off Your Shoulder," but Smith was still spanking it.

The funnymen recovered and decided to "Make It Rain" before "Picking Up the Money Because That's all You Had." When Fallon began to demonstrate the "Twerk," 45-year-old Smith bowed out and walked offstage.

The recurring bit is a fan favorite. During his tenure on Late Night, Fallon performed "The History of Rap" with Justin Timberlake; the singer later helped Fallon with his "Evolution of End Zone Dancing" tutorial. Fallon also once demonstrated "The Evolution of Mom Dancing" with First Lady Michelle Obama.

Eonline