Item description:

Load the game.

Press R1 and select the Ranger team that is returning to base.
If you do it quick enough, you will get them just before they turn away from the hills.

Reverse back from them and drive as fast as you can to jump over them.
As soon as you land, turn around and drive back over them.

You must do this as quick as possible as you have to be in the air for a total of 5 seconds within
a 20 second window.

It may take a few tries to get the timing down, but you'll get it when you get a notification of a new
skin being unlocked.