Drew Barrymore’s directorial debut film “Whip It,” released to theaters in early October of this year, brought roller derby mania back to the mainstream. Taking it from the big screen to real life, the San Diego Derby Dolls (SDDD) are hosting Humboldt Roller Derby (HRD) Saturday Nov. 21 for some hard hitting roller derby action at the Del Mar Fairgrounds. SDDD’s Hard Corps will face HRD’s Redwood Rollers.