Почитал.
When using its jump pack (whether moving, charging or Falling Back, as we'll discuss in a moment) a model can move over all other models and all terrain freely. However, if the model begins or ends its move in difficult terrain, it must take a Dangerous Terrain test.
Написано кривовато по поводу мув овер, но у джетбайков тоже самое
Jetbikes can always move over all other models and all terrain freely. However, if a moving Jetbike begins or ends its move in difficult terrain, it must take a Dangerous Terrain test.
Т.е. джетбайки тоже замедляются в террейне, или я не туда смотрю?