Cole saw Zack's angry expression and was not afraid; he thought Zack would have a hard time even standing up for the rest of his life. Given the injuries Zack had sustained and the methods of the Mercenary Team's captain, Mura, the most likely outcome of this situation was that Zack would be ruthlessly abandoned by the Mercenary Team.
Of course, saying "abandoned" would be too unfeeling. The method would probably be as follows: considering Zack's severe injuries and his inability to walk, as well as his difficulty in facing the dangers the Mercenary Team would encounter later, Mura would leave Zack at the inn to recuperate and hand the innkeeper a large sum of money.