DarkDragoon said:The torturer specifically said that he cut his tendons to keep him from running away, so obviously there was a chance of that happening had he not severed them right away.
There was no chance before they unshackled him, and they only did so once the torturer had done that as far as we can see. The contrary would have been stupid. In the few shots of him we see before he was tortured he was pretty much unable to move. They obviously took precautions because they knew who they were dealing with.