Security jobs in your ZIP code
This question helps your interviewer to assess your reasoning and decision makings skills, which can be crucial for a security guard.
Possible Answer:
I will call for help and wait at my post.
If help is not forthcoming, and if the situation seems like a life and death emergency, then I will rush to help the person in need, while keeping an eye on my post.
In case of such emergencies, I think helping someone takes priority over staying at my post.