Racing Game Pre Pro - Stunts and Paper Map

Thinking more about one of my stunts I came up with something like this:

The floating diamond would be a trigger, that when activated does this:

So, you hit this jump and these poles/ spikes/ whatever come flying out of the ground on either side of this big barrier in the middle. Anyone underneath would be launched, and anyone behind would slam into them. I think that once the poles fly up they will recede back into the ground.  This trigger has to be really risky to hit, but if you do you get a good lead. To make it harder to hit the ramp leading up to it would have tobe narrow and you'd have to be going really fast to make it over the big barrier. If you didn't hit the jump just right you wouldn't make it over the barrier and hit the trigger. I was also thinking of having that ramp at an angle on the opposite side of the track coming out of a turn. That would make it harder to reach as you would be turning or dodging stuff as you try to hit the ramp.

I thought of another obstacle/stunt that I would really like to implement. 

In part of my level I want to have this tunnel that is like a half pipe, where you can ride the walls a little bit. I was thinking through this tunnel there could be these huge industrial fans that moved fairly slowly, or maybe at different speeds, or the speeds vary throughout the race. OR you can hit a switch and make a fan go crazy and speed up. Anyway it would basically be the windmill at a putt putt golf course. And raised up on either side of the tunnel are super narrow platforms that you can drive on and avoid all of this if you are good enough to get on top of them.

Here's a 1st pass paper map of a top down of my track. Drawing this I was thinking more about the actual width of the track than the length, so it's not drawn completely to scale. 

Throughout the track I want to have different little ramps and routes you can take, nothing severe, just some changes in elevation on one side of the road or something like that. The shortcuts are more like alternate routes, than shortcuts. The level has more gradual turns to make it a faster race. The track is fairly narrow for the most part but opens up in some places. One thing I think I could add is a straight away portion. For most of this track you are turning, and in a lot of games I notice there is at least a small section that is just straight to make you feel like you are going faster, or to gain speed for something epic. Oh, that raised part of the track, furthest to the right would be a platform type thing that has no guard rails but if you can get up there and stay up there it's faster than taking the bottom two routes.