Faster cars (mustang)...
	Massive air...

On the level 'stock car' if you go fast enough you will hear a sound when you have heard this sound you have unlocked the super mustang.

Go to the Ford Collection and select "Time Attack". Choose the Temple Ruins track. Use the '56 Ford F-100 as your car. Once the race has started, turn around and go as fast as possible, then go up to the big hill just after the starting line (still driving the wrong way). You will fly at heights of over 50 feet. Try different cars for even bigger heights.