Random question (not expecting expert quality answers here, but curious)

If you have only minimal first aid training and no particular combat training, you are in a mostly deserted area, and you hear a gunshot somewhere nearby but out of sight, what do you think the rational altruistic response?

Edit: In this scenario, you either don't have a phone, there are no police in the area, or otherwise "easy way out" are not available. You can choose to whether and how to help by yourself, and that's it.