If I have a bystander on the scene when I get to ped struck call I want to know everything about the events. How fast the car was going, how she was hit, did the body moved, did she passed out. If I have you around and you are willing to help I will employ you with small skills. If there is a lot of blood I will ask you to pass me equipment so my bag doesn’t get contaminated. Plus when making a call be as specific as you can be. More info I have on the way it gives me more time to get my equipment list ready. Also from the legal point of view if she was day dreaming and she walked into intersection, help the driver out. Go over to him and offer yourself as a witness. Or if the driver runs a light than stick around and tell PD what you’ve seen.
You shouldn't do any splinting and bleeding control should be limited to the minimum. I have to examine all the wounds and if you cover them I have to look under your dressing which may open up the hemorrhaging again. Since this is a trauma call to open airway you are doing jaw trust not head tilt, chin lift and it's a difficult task. Patient should be intubated and lines should be run. Any movement compromises the spine and proper techniques should be use to get patient on the long board. But in this case it's a simple scoop and go. Patient needs hot lights and cold steel not me.
But most important thing is scene safety. Don’t run into the street to check if she is all right and get hit by another car.
Matt