In-air gyroscopic control is a technique where the driver uses the rotation of the wheels to tilt the car while jumping. By hitting the gas, the spinning tires pull the nose of the car up. By hitting the brakes, the sudden stop in wheel momentum forces the nose down.
For people doing their third expedition like me, you’ll be able to repair 65% of your total durability instead of just 50%, which basically gives you extra "free" repairs. This is huge because it means you can fully repair your Level IV weapons in just two repairs instead of three. For example, one repair will take a weapon from 0/130 to 91/130, saving you a ton of rare resources.
Back in Forza Horizon 4, I was battling against this rammer in a Toyota Baja. I finally managed to pass him, but he rammed me. At that point, I knew the race was lost. The game was tied at 2/2. But I had an extremely small chance of making it through the hairpin if I could squeeze through the gap between the trees, which should keep me in the race. If I crashed, it was game over. So I yanked the handbrake and aimed at the gap. By a miracle, and thanks to the cambered corner, I made it through the hairpin, took first place back, and won the race and the game for our team.