If you don’t let it go, the car will crash into the wall and the steering wheel will turn really fast, and if you don’t, you can get seriously injured 
I didn’t even put the screwdriver in the video above and had to put an iron core in my finger
The standard is a posture where you take your hands off and put your arms together with your chest. If you make a mistake and roll, you can see the driver take that posture