You were struck and it’s clearly not your fault! If at all possible, don’t remove your vehicle until the police arrive, allowing them to view and ensure whatever evidence which may be important.DEALING WITH THE EYE WITNESS, IF INDEED THERE IS ONE: You MUST have a pad, pencil and/or pen with you (best place to keep them is in your glove compartment)however it’s not a good idea to ask, “Did you witness this“? More often than not that will turn them off!It’s much better to ask, “What happened her.