COMIC CON IS ON!:
Costumed characters pose outside of the convention center on day 1 of the 2014 Comic-Con International Convention held Thursday, July 24 in San Diego. Photo: Associated Press/Denis Poroy/Invision
"Concussion" is based on Dr. Bennet Omalu, who was the first to discover the existence of chronic traumatic encephalopathy (or CTE): a disease of the brain found in athletes with a history of repetitive brain trauma.