Where the first Showcase event takes place, near the mid-point of the map's right side, you can find a Bucket List Challenge. Accept that challenge. From the start, perform a quick 180-degree turn at the very start. Head out of the hangar and turn left to follow the sidewalk, ramming objects as quickly as possible to build up a wreckage combo. Near the end, perform another 180-degree turn and follow the sidewalk again, all the way past the end of the road. If you have done it properly, you get air twice and then launch down the hill. Continue holding down the accelerator and drift left or right. This typically results in a bonus for executing a kangaroo combo, and you should also earn a 'Great' or better rating for your drift. Once you have mastered it, you can repeatedly perform this technique for easy skill points.