Some Wrestling Fans Just Learned What John Cena’s ‘Five Knuckle Shuffle’ Actually References

John Cena continues to surprise pro wrestling fans in unexpected ways.

Cena named one of his signature moves the “Five Knuckle Shuffle.” Cena also called his finishing move the “FU” as a nod to Brock Lesnar’s F5. However, he later changed it to a more fan-friendly “Attitude Adjustment.” Despite that change, the Five Knuckle Shuffle kept its name.…