O.S. Bar
The bar you hold when the driver does something so dumb, like swerving into oncoming traffic, and you're like 'Oh Shit!' and you hold on for dear life.
I grabbed the O. S. Bar and said 'Oh Shit!' when the driver tried to pass a truck and missed completely.
My brother grabbed the O. S. Bar and laughed when the driver swerved into a parked car.
I grabbed the O. S. Bar and said 'Oh Shit!' when the driver tried to do a U-turn in traffic and almost got hit.