GMC wants to know how you show up to your child's karate practice. Do you just bring it, or do you bring it all? When one mom rolls up in her Acadia to drop off a car full of kids in their karate gear, it's a good thing she checks her rear-view mirror because she finds one boy hiding in the third-row backseat. He's got his headphones on, so Mom calls out, "You gotta go!" to get him moving.