I need some words/sentences/etc to describe someone who is past their breaking point. Physically, I mean. For example, say there is a guy on a rooftop who is being drained of all his energy by some random creature. He gets thrown off a rooftop, somehow is saved, and then realizes his friend in his danger. Despite the fact that he is incredibly drained, and how he didn't even have the energy to even stand a few seconds ago, he somehow pushes himself and runs inside the building. He starts running down the hallways as fast as he can possibly go. Give me some words to describe his physical health, as he continues to go past his breaking point. Stuff I've used: >Every step he took felt like it would be the last he would ever take (probably bad wording, feel free to give better wording) >Could feel his body tearing apart at the seams >His body was screaming at him to stop Stuff like that.