As a first responder, you are welcome to make medical decisions based on the injury but you also must promote the learning of first aid. First aid is given to prevent any further aggravation of an injury for the injured. Here are the 4Ps of first aid.
A few days ago, I was buying milk from a shop nearby and returning home. A construction site near the shop and a water carrier lorry was standing in front of it. While crossing the way, I turned back to check out the work going on and noticed a few ppl stand in a circle with a man leaning against the knee of the person who stood against the wall.