Hidden Lines

I don't know if this has been tried yet, but I thought it would be a neat idea. The track here is all off road, you pretty much ascend and descend a mountain face within a confined span of area in the orange barriers; if you have the fastest, smoothest line, and don't hit trees, rocks, or barriers, you will have a better time. Its like free ride technical offroad: Note, this is only a concept, I don't know how much people will like this, but give it a try and tell me what you think!