Because if he hadn't have shortened his stride his heel would have partially clipped Kodis head and Jerome would have ended up landing awkwardly and rolling his ankle possibly spraining it.Point taken Wrighty, but Luai steps to the side of Kodi and as you say "shortens his stride." Why would he shorten his stride for any reason other than to deliberately step on Kodi's head? Luai could have continued to step around Kodi and avoid Kodi all together. He wasn't in contention for chasing down the kick through. I could understand the argument if there was some urgency in Luai trying to get to the ball and in doing so accidentally stepped on Kodi's head, but he was no where near the ball and had no urgency in getting to it.
Yes he chose to stand on Kodis head on purpose no question
But he did so out of self preservation to avoid landing awkwardly and not to hurt Kodi.
It was also happening very fast and instinctive so he might have mistakenly made a calculation.