In case of emergency, what should I do if there is a chance that someone may have been seriously injured?
user
In an emergency situation, if there is a chance that someone may have been seriously injured, you should immediately call 911 or the local emergency service number, and provide as much detail as possible about the incident. 
You should also make sure to stay calm and provide help to the best of your ability while awaiting professional assistance.
assistant
In case of emergency, what should I do if there is a chance that someone may have been seriously injured?
user
If there is a chance that someone may have been seriously injured in an emergency situation, you should call 911 immediately and await the arrival of medical professionals.
assistant
In case of emergency, what should I do if there is a chance that someone may have been seriously injured?