Are you allright??
Is the man you hit allright?
I would think the impact alone would leave you both with muscle trauma, possibly headaches. And you usually don't feel the nerves and joints getting stretched and smashed until the infflammation sets in.......later to be degenerative disc disease or some such extraneous fallout. (it happened to me)
And I really think someone should have called the police for a report, so no one gets sued down the road. Let us know how you're doing. Might want to call the guy too.
Was it your fault? Was it daylight? Get the Motrin out pronto.