Final answer:
In case of a screwdriver embedded in a victim's chest, call emergency medical care without delay, do not remove the screwdriver, and if trained, initiate CPR with caution.
Step-by-step explanation:
If you find yourself in the situation where there is a screwdriver embedded in the chest of an unresponsive victim, the first and most important action is to call for emergency medical care immediately. Do not attempt to remove the screwdriver, as it may be acting as a plug and preventing the victim from bleeding out. While you wait for professional help, if you are trained, you can begin CPR if the victim is not breathing or does not have a pulse. However, be very careful to avoid putting pressure on the impaled object. It is also important to keep the victim as still as possible to prevent further injury.
Remember, tools such as power drills or socket wrenches cannot help in this situation and should not be used on the victim. Focus on providing support and comfort without moving the screwdriver, and follow the instructions of emergency responders when they arrive.