Final answer:
The recommended order of contact in a dangerous workplace situation is to report to a supervisor first, inform coworkers second, and take immediate action last, but only if it is safe to do so.
Step-by-step explanation:
The order of contact when you see something which could endanger the safety of your fellow workers is often guided by the specifics of the situation and the policies of the workplace. However, a common approach advised for dealing with such situations is to first report to a supervisor about the dangerous condition, as they are typically trained to handle emergencies and can take the necessary actions to resolve the issue. Following that, one should inform coworkers to ensure they are aware of the possible danger and can take steps to protect themselves. Lastly, if the situation calls for it and there is no immediate response from the supervisor, you may need to take immediate action to prevent harm, but only if it is safe for you to do so. This follows the general protocol of ensuring that those with responsibility and the ability to mitigate risk are informed first, while also making sure to protect yourself and those around you.