Get in your car, buckle up, accelerate quickly up to about 30 mph and slam on your brakes. Repeat a couple times. Drive fast while making hairpin turns. Don't slow down on the turns. Then find a banked curve and put the pedal to the metal up to 65mph. Again, rapidly decelerate.
Would you feel comfortable in a car if someone was driving you around like that? That is what Test Track is about.
You might be tough as nails, but your developing baby is NOT.
I wouldn't even consider riding Test Track while pregnant.