Get all wheels of your car into the air for at least 20 meters and then touch the ground again.
This should come at some point as you progress through the game, likely in the latter part of the 1950s segment when you've unlocked some of the faster vehicles. If you're having trouble, the raised track in Hunters Point near the Grand Upper Bridge and the ramps in Westbank Steel are good places to get this.
- The original name of this achievement was "Auto Pilot".
- The Steam version of this achievement uses the description: "Keep a vehicle in the air for over 5 seconds".