New Orleans, Louisiana (CNN) -- Sister Helen Prejean blasts the air-conditioner in her champagne-colored Toyota Corolla, the back bumper held up with duct tape. It's clear why friends insist on driving when they are with her. She could rival NASCAR's Danica Patrick on the gas pedal. Age -- she turned 75 this year -- hasn't slowed her down.
She was weaving all over Interstate 10 when police stopped her one time. Turned out she was reading while driving. The officer let her go when he discovered who she was: "I'll go straight to hell if I ticket a nun," he said
He made her promise she would never do that again. So now she depends on iPhone's Siri for driving directions and making phone calls. She also likes to play Plants vs. Zombies (not while in motion, of course) even though the violent nature of the game goes against her Christian principles.