Once upon a time there was a girl who used to be quite good at driving wagons. She had been driving wagons since she was the legal age to drive wagons in her Realm. She passed her wagon driving test with no problem at all. She even got a licence to drive horses and passed it at the first attempt. The Realm she used to live in was very famous for its traffic, the complexity of its roads (which all lead to the same capital of that realm) and the belligerence of its drivers. In that Realm if your wagon was too small or too low you would risk to be hit by some magic spell from the monster behind you.