While doing any type(racing,freestlye,etc.) And while driving press UP-DOWN "X." You do a bunnyhop. Some trucks can get higher than others. HINT: Try "Blue Thunder"
Use normal mode and win season 1 using cash grab mode
Use normal mode and win season 2 using cash grab mode
Win a season using any difficulty setting to get the championship version of the truck
Use normal mode and win season 3 using cash grab mode