Endo
Drive forward with boost & then go straight into reverse with boost.

4-wheel steering
When using a wheel and pedals for driving and you want 4-wheel steering, the left paddle under the wheel is the 4-wheel steering control.

Cheat
R1 ,L1 , R2 , L2, up (2) down , left , right

Sam Boyd Stadium high score hint.
If you want a high score at Sam Boyd Stadium in freestyle, then just do donuts, weelies, endos, and when you go out there at first, all you have to do is hit that yellow semi trailer and you'll get big points. I hope this can help you guys.

Getting a good monster truck from the beginning that will beat the not unlockable ones
Go to london rails and do donuts and when your spectacle point stars reach 1 away from a spectacle point stop for a couple seconds than do more donuts until you get a spectacle point. repeat this 6 times.(when waiting a couple seconds make sure your stars don't go down or else you have 2 start that spectacle point over)(how to do a donut is hold L,left on the arrows and, x)(L gives you backward tire steering)(L is different than left on the arrow keys)