Yeah, I knew he was able to breathe because his windpipe was sticking out the side but his tongue was limply flailing and he got extremely weak after 15 minutes of trying to rub his face against things and was doing something along the lines of a snake panting like a dog.
It actually wasn't very difficult to put his jaws back in place. I just had to push them gently in the right directions and when he yawned everything was okay. I didn't reach in his mouth, just pushed from the outside.
It was just super scary seeing him without the bottom half of his face!