Hope this doesn't come across wrong but there's no way the pathfinder impacted you at 50+mph with a boat on the hitch. Its probably closer to half that, maybe a good bit less since it seems like it went over the top of your reinforcement bar in the rear and didn't do as much damage as I would expect/have seen. But I guess since you hit into the old guy some energy had to accelerate you again. I wonder, did the pathfinder end up jack-knifed? I tow mva's etc and spend too much time in a body shop so this **** interests me
Your pinched nerve/numbness is no joke though and I feel bad for you there. Hope that is just temporary and heals quickly. Did your air bags deploy?