An Era of Headbangers' Football

In the opening scene of Kevin Cook's The Last Headbangers: NFL Football in the Rowdy, Reckless '70s—The Era that Created Modern Sports former Oakland Raiders linebacker Phil Villapiano is dissatisfied with the fact that his helmet is jiggling around no matter how tightly he buckles the strap. With Franco Harris to spy on and Terry Bradshaw to blitz, Villapiano has no time for his helmet to be wiggling and impairing his vision. So he sought his nearest option.

Villapiano went to the wall and slammed his head into the wall until his head swelled up to fit the helmet. And it worked.