You don't know what you're talking about, figures. After Luke cut his blaster in half and knocked him on his ass, Boba got up and shot at him with his wrist blaster; he missed and Luke was distracted fighting off 3-4 other guys.
You also can't read. Boba doesn't have his ship in this fight and this fight tales place in Gotham, which I'm fairly certain isn't on top of a mountain.