She also wields pistols capable of firing concussive blasts. Vance Astro is a mutant who possesses a psychokinetic ability, limited to projecting concussive blasts. He can project blasts of highly concussive kinetic force from his hands. He can focus this into concussive blasts. She can channel this ability to create protective force fields and blasts of concussive force. Diffuse axonal injury is a key pathology in concussive brain injury. He is also capable of issuing concussive blasts with a wooden object, usually a shillelagh. Cushioning is used to negate concussive injuries. Concussive shock caused severe damage to fire-control equipment. These "time bombs" explode with concussive force. The rod is capable of projecting vast amounts of destructive energy and concussive force. Controversy continues to surround the NFL response to concussive injuries among current and former players. The "Kamehameha" is a concentration of Ki, released as a concussive beam. Despite past accounts, the energy that Havok releases is not truly a concussive force. Underneath the helm, the wearer traditionally had a leather cowl to protect from concussive impacts.