It's the first time that Billy has ever been able to ride with Rosa, and he's psyched. He's also psyched that he'll be able to compete against her at this point in the season. He tells him to be careful with the throttle, because it's still a long way off. He also tells him that he needs to keep Rosa's helmet in front of him, so that she can't see him. He says that he doesn't want to get hurt, even if it means risking his life. He asks if anyone has ever gotten hurt while riding a bike, and Billy says that's just not true. He adds that if you're pushing yourself too hard, you shouldn't be riding the bike at all. Then he tells Billy that if he wants to help him, he should ask for it. Billy is all, "Sure, I'll help you, too" . But then he says that if it turns out to be a bad ride, he won't do anything to help. He just wants to be safe.