If you think you're going to brush up against another car, simply
pull your foot off the accelerator. Without the pedal depressed,
your car won't fall into a spin as easily.
EA Sports' NASCAR cars have far less braking ability than the Papyrus
variety. Prepare even earlier for corners, and do what you can in the
garage to enhance your stopping ability.
Don't ever, ever place a wheel on the grass. The quite possibly
airborne consequences can be inordinately horrific.
Launch into the air:
Select Michigan as the track and choose either practice or race mode.
As you are heading into turn 1, stop and turn around. Drive directly
into the gap between the two pit walls. Your car will fall far below
the track then shoot high into the air.