From the picture, the events in the construction site. A man who wear the white shirts are in danger. Construction materials are falling down to him, but the old man behind is shouting to him to be careful. In fact, If you are in a construction site like this. You should know how to protect yourself To avoid harm to yourself. A man who wear the white shirts should wear the proper head protection because we don't know that when accidents will happen to us? When we came out of the construction area so, we can remove the protective devices off.