You're driving down the road and as you approach a stop sign, the vehicle behind you crashes into your back bumper. The accident is their fault, but in the heat of the moment, you don't think about that. The anxiety and stress of the crash leads to you making a bad decision -- you get angry and upset, and you flee the scene of the accident. As a result, the police arrest you for a hit and run.
This is just one example of reacting really poorly to a motor vehicle accident. There are also plenty of drivers that get out of their car after an accident and they yell and scream at the people involved in the crash, elevating the tension of an already acrimonious moment.
Ultimately, once a car accident has happened, the best thing you can do is handle the situation as calmly as you can. This means that after you get into the accident, you should check on all of the people involved in the crash and provide any medical assistance that you can. Call 911 if serious measures need to be taken. If it isn't that serious, then you should exchange information and discuss the crash with the people involved.
You should also collect information from the accident scene. This means taking out your cell phone and taking pictures of the scene, including the damaged vehicles, the intersection itself, and any street signs of lights that were involved in the wreck.
Source: FindLaw, "After a Car Accident: First Steps," Accessed May 3, 2018