O.S. Bar
The bar on the side of a car seat that people grab when the driver does something stupid like swerve like a maniac and yell 'Oh Shit!' because they're about to crash into a tree or a mailbox.
My friend grabbed the O. S. Bar so hard, the bar almost broke when the driver slammed on the brakes.
I grabbed the O. S. Bar and screamed 'Oh Shit!' when the driver turned so fast, I almost flew out the window.
My mom grabbed the O. S. Bar and said, 'I'm not going to die in a stupid car crash!'