This is how to perform the super high jump glitch on razorback that I posted a while ago. ^up 3^
1. get to the river halfway round the track, stop and turn around as you cross it. Drive back across...
2. As you reach the other side run into the bank on the left.
You will have to practice to hit the right spot at the right speed.
If you get it right your vehicle will fly into the air!
So far it seems to only work on festival mode for me, I use the race on Razorback where the tracing truck is first available, although the glitch will work on all vehicles.
Try it and take a photo to see who can get the highest or best phiotography.