Johns speed increased, faster and faster "if you want a challenge you got it" his speed kept increasing, he turned to see if she was still following and saw her slowing "getting tired" he barked playfully not realizing she was slowing to take the corner that john didnt realize was coming up. He turned his head just in time to see the wall and use his shoulder instead of his face to slam into it. The hit was bone crunchingly strong the echo of the wall cracking, of books in the office on the other side falling down and of course Johns shoulder blade cracking and his head still slamming into the wall. The pain would be unbearable...to a conscious man, luckily John was unconscious.