Get 100 stunt driver points.

You will get given stunt driver points for doing crazy things in the vehicle you are driving. I have managed to get points in all vehicles except planes & boats (although I think boats are possible). There are a few ways to get the points, they are:

Driving Off Of Edges/Spinning Out Of Control This can be random points. If you ever happen to fall off of an edge or happen to crash pretty hard & spin out of control then you may get some points.

Ramps There are alot of ramps scattered around villages and towns in Panau. Simply drive up to a ramp with alot of speed and fly off, you will get a different amount of points depending on how good the jump/stunt was.

Driving At Speed This is definitely the easiest and quickest way to get 100 points. All you have to do is get into a fast vehicle, find a straight road such as a highway & drive as fast as you can. When you reach top speed you will start to earn stunt driver points almost every 5 seconds.

You will see a notification at the top of the screen everytime you earn a stunt driver point. Just a small extra bit of info, my two vehicle recommendations when attempting this:

Car Civadier 999 Cabriolet, this can be found in the Panauan Capital.

Bike Hamaya Cougar 600, this can usually be found all over Panau.