On Saturday, UFC bantamweight champion Dominick Cruz attempts to defend his title for the second time, and the fourth if you count his run in the now-defunct WEC.
Standing in his way is a fighter equally as quick as he is, Demetrious Johnson, who looks to break the hard-to-decipher rhythm Cruz has used to impose his will in fights.
The five-round title fight headlines UFC on Versus 6, which takes place at Verizon Center in Washington, D.C. Main-card action airs live on Versus while Facebook streams the prelims.