cold upper leg caning, can you spot when he's having the most trouble?

Description: Welcome! my slave has been bad and made many mistakes. therefore he eared 800 cane strokes. we all know 800 is way to much to take at once so i devided it in half. i put my slave a leather straitjacket on and tied him up to my medical chair where he received the upper leg caning. can you spot where it all becomes to much for him?