Sen. Joe Hardy, R-Boulder City, introduced a bill Wednesday to require teens riding “longboards,” oversized skateboards with bigger wheels that go faster than standard ones, to wear helmets. “They're more stable than skateboards, and they go faster,” Hardy, a doctor, said of the longboards, adding that there’s more danger of injury to such boarders if they fall. He said a teen in his neighborhood crashed while riding a longboard, suffered severe head trauma and now is in rehabilitation. The bill would give parents more leverage to order their children to wear helmets than just telling them “because I said so,” …