Marcus had moved behind Henry casually as Rin confronted him, catching the older man and keeping him from hitting the ground or car with a loud thud.  The whole point here was to be quick and quiet, and a thud like that would not help at all.  He didn't doubt Rin's blows had seen him senseless, so without further ado he began hauling Henry back towards their own car with the intention of dumping him in the truck bed.