Nuance, tell the family members to get down low. Hand over wallet. Having done three or four car defense classes, shooting, driving, bailing out, through the glass, etc. this seems a low probability shoot out for the victim. If one must though, the rest of the family hit the floor.
Anecdote, under fire from the Gods. Driving home, a block away - a hailstorm unleashed with true orange, baseball sized hail. Made it to the drive way. Told the wife to get under the dash, put my body over her. Car was totaled. The neighbor had the hail come through his siding like cannonballs. Quite impressive. The concrete still showed impact hits, years later.