sorry to hear that, punkncat. I think I recall from previous threads that your son is around 14 and you have been trying to get him into road biking?

10 miles is very doable, but it sounds like you told him the route was not safe and not to do it? if so, I'm not sure I have the answers regarding his disobedience. probably a mixture of punishment and encouragement to do new things. there's no single answer for any kid acting out, but teens can be especially hard to reach once they go off the rails.