Planet 51

The “B button” is the jump button, and if you don’t achieve this randomly from attempts or just driving around, on the last section of the game “Desert” during the RACE tasks at the very end of the race there will be a VERY large jump. Save your TURBO, and use it the whole way before hitting the peak of the jump, also press and HOLD the “B button” right before reaching the peak of the jump. Here you should have no problem unlocking this achievement.