The rest of that made like zero sense to Heiji, but at the word 'concussion', Heiji drew in a quick breath, almost as though the word had been a physical thing that struck him from behind. His eyes darted quickly to Simon, then back to Hershel.

Ohhhhhhhhhh. Oh, thank goodness. He lowered his voice a little. "Sorry," he whispered. "Is he... okay?"