We had a similar weird case (that i presented recently) where this guy was stopped on the side of the road, possibly actually in the lane rather than the shoulder, and got rearended, had these injuries, eventually died, but there were some unanswered questions. most probably the patient/the guy in the stopped vehicle had pulled over due to a severe sudden medical illness and coincidentally got hit by another car because he'd stopped unexpectedly. https://thebolditalic.com/the-day-i-killed-someone-c7fe4bb20190